diff --git a/framework/control.class.php b/framework/control.class.php
index f108ebe71b..166be72c28 100755
--- a/framework/control.class.php
+++ b/framework/control.class.php
@@ -137,14 +137,6 @@ class control
      */
     private $output;
 
-    /**
-     * The directory seperator.
-     * 
-     * @var string
-     * @access protected
-     */
-    protected $pathFix;
-
     /**
      * The prefix of view file for mobile or PC. 
      * 
@@ -171,7 +163,6 @@ class control
         $this->config   = $config;
         $this->lang     = $lang;
         $this->dbh      = $dbh;
-        $this->pathFix  = $this->app->getPathFix();
         $this->viewType = $this->app->getViewType();
 
         /* Load the model file auto. */
@@ -295,7 +286,7 @@ class control
         if(isset($this->config->viewPrefix[$this->viewType])) $viewType = 'html';
 
         /* The main view file, extension view file and hook file. */
-        $mainViewFile = $modulePath . 'view' . $this->pathFix . $this->viewPrefix . $methodName . '.' . $viewType . '.php';
+        $mainViewFile = $modulePath . 'view' . DS . $this->viewPrefix . $methodName . '.' . $viewType . '.php';
         $extViewFile  = $viewExtPath . $this->viewPrefix . $methodName . ".{$viewType}.php";
         $extHookFiles = glob($viewExtPath . $this->viewPrefix . $methodName . ".*.{$viewType}.hook.php");
 
@@ -337,12 +328,12 @@ class control
         $moduleName   = strtolower(trim($moduleName));
         $methodName   = strtolower(trim($methodName));
         $modulePath   = $this->app->getModulePath($moduleName);
-        $cssMethodExt = $this->app->getModuleExtPath($moduleName, 'css') . $methodName . $this->pathFix;
-        $cssCommonExt = $this->app->getModuleExtPath($moduleName, 'css') . 'common' . $this->pathFix;
+        $cssMethodExt = $this->app->getModuleExtPath($moduleName, 'css') . $methodName . DS;
+        $cssCommonExt = $this->app->getModuleExtPath($moduleName, 'css') . 'common' . DS;
 
         $css = '';
-        $mainCssFile   = $modulePath . 'css' . $this->pathFix . $this->viewPrefix . 'common.css';
-        $methodCssFile = $modulePath . 'css' . $this->pathFix . $this->viewPrefix . $methodName . '.css';
+        $mainCssFile   = $modulePath . 'css' . DS . $this->viewPrefix . 'common.css';
+        $methodCssFile = $modulePath . 'css' . DS . $this->viewPrefix . $methodName . '.css';
         if(file_exists($mainCssFile))   $css .= file_get_contents($mainCssFile);
         if(is_file($methodCssFile))     $css .= file_get_contents($methodCssFile);
 
@@ -379,12 +370,12 @@ class control
         $moduleName  = strtolower(trim($moduleName));
         $methodName  = strtolower(trim($methodName));
         $modulePath  = $this->app->getModulePath($moduleName);
-        $jsMethodExt = $this->app->getModuleExtPath($moduleName, 'js') . $methodName . $this->pathFix;
-        $jsCommonExt = $this->app->getModuleExtPath($moduleName, 'js') . 'common' . $this->pathFix;
+        $jsMethodExt = $this->app->getModuleExtPath($moduleName, 'js') . $methodName . DS;
+        $jsCommonExt = $this->app->getModuleExtPath($moduleName, 'js') . 'common' . DS;
 
         $js = '';
-        $mainJsFile   = $modulePath . 'js' . $this->pathFix . $this->viewPrefix . 'common.js';
-        $methodJsFile = $modulePath . 'js' . $this->pathFix . $this->viewPrefix . $methodName . '.js';
+        $mainJsFile   = $modulePath . 'js' . DS . $this->viewPrefix . 'common.js';
+        $methodJsFile = $modulePath . 'js' . DS . $this->viewPrefix . $methodName . '.js';
         if(file_exists($mainJsFile))   $js .= file_get_contents($mainJsFile);
         if(is_file($methodJsFile))     $js .= file_get_contents($methodJsFile);
 
diff --git a/framework/helper.class.php b/framework/helper.class.php
index 8be62dfb65..baf866105d 100644
--- a/framework/helper.class.php
+++ b/framework/helper.class.php
@@ -162,7 +162,7 @@ class helper
 
         /* Else, judge whether needed update or not .*/
         $needUpdate      = false;
-        $mergedModelFile = $app->getTmpRoot() . 'model' . $app->getPathFix() . $moduleName . '.php';
+        $mergedModelFile = $app->getTmpRoot() . 'model' . DS . $moduleName . '.php';
         $lastTime        = file_exists($mergedModelFile) ? filemtime($mergedModelFile) : 0;
 
         while(!$needUpdate)
@@ -237,7 +237,7 @@ class helper
             $modelLines = join("\n", $modelLines);
         }
 
-        $tmpMergedModelFile = $app->getTmpRoot() . 'model' . $app->getPathFix() . 'tmp.' . $moduleName . '.php';
+        $tmpMergedModelFile = $app->getTmpRoot() . 'model' . DS . 'tmp.' . $moduleName . '.php';
         if(!@file_put_contents($tmpMergedModelFile, $modelLines))
         {
             die("ERROR: $tmpMergedModelFile not writable, please make sure the " . dirname($tmpMergedModelFile) . ' directory exists and writable');
diff --git a/framework/router.class.php b/framework/router.class.php
index 8dff4f60ff..29d7b278f7 100755
--- a/framework/router.class.php
+++ b/framework/router.class.php
@@ -17,14 +17,6 @@
  */
 class router
 {
-    /**
-     * The directory seperator.
-     * 
-     * @var string
-     * @access private
-     */
-    private $pathFix;
-
     /**
      * The base path of the ZenTaoPMS framework.
      *
@@ -345,7 +337,7 @@ class router
      */
     protected function setPathFix()
     {
-        $this->pathFix = DIRECTORY_SEPARATOR;
+        define('DS', DIRECTORY_SEPARATOR);
     }
     
     /**
@@ -356,7 +348,7 @@ class router
      */
     protected function setBasePath()
     {
-        $this->basePath = realpath(dirname(dirname(__FILE__))) . $this->pathFix;
+        $this->basePath = realpath(dirname(dirname(__FILE__))) . DS;
     }
     
     /**
@@ -367,7 +359,7 @@ class router
      */
     protected function setFrameRoot()
     {
-        $this->frameRoot = $this->basePath . 'framework' . $this->pathFix;
+        $this->frameRoot = $this->basePath . 'framework' . DS;
     }
 
     /**
@@ -378,7 +370,7 @@ class router
      */
     protected function setCoreLibRoot()
     {
-        $this->coreLibRoot = $this->basePath . 'lib' . $this->pathFix;
+        $this->coreLibRoot = $this->basePath . 'lib' . DS;
     }
 
     /**
@@ -393,11 +385,11 @@ class router
     {
         if(empty($appRoot))
         {
-            $this->appRoot = $this->basePath . 'app' . $this->pathFix . $appName . $this->pathFix;
+            $this->appRoot = $this->basePath . 'app' . DS . $appName . DS;
         }
         else
         {
-            $this->appRoot = realpath($appRoot) . $this->pathFix;
+            $this->appRoot = realpath($appRoot) . DS;
         }
         if(!is_dir($this->appRoot)) $this->triggerError("The app you call not found in {$this->appRoot}", __FILE__, __LINE__, $exit = true);
     }
@@ -410,7 +402,7 @@ class router
      */
     protected function setTmpRoot()
     {
-        $this->tmpRoot = $this->appRoot . 'tmp' . $this->pathFix;
+        $this->tmpRoot = $this->appRoot . 'tmp' . DS;
     }
 
     /**
@@ -421,7 +413,7 @@ class router
      */
     protected function setCacheRoot()
     {
-        $this->cacheRoot = $this->tmpRoot . 'cache' . $this->pathFix;
+        $this->cacheRoot = $this->tmpRoot . 'cache' . DS;
     }
 
     /**
@@ -432,7 +424,7 @@ class router
      */
     protected function setLogRoot()
     {
-        $this->logRoot = $this->tmpRoot . 'log' . $this->pathFix;
+        $this->logRoot = $this->tmpRoot . 'log' . DS;
     }
 
     /**
@@ -443,7 +435,7 @@ class router
      */
     protected function setConfigRoot()
     {
-        $this->configRoot = $this->appRoot . 'config' . $this->pathFix;
+        $this->configRoot = $this->appRoot . 'config' . DS;
     }
 
     /**
@@ -454,7 +446,7 @@ class router
      */
     protected function setModuleRoot()
     {
-        $this->moduleRoot = $this->appRoot . 'module' . $this->pathFix;
+        $this->moduleRoot = $this->appRoot . 'module' . DS;
     }
 
     /**
@@ -465,7 +457,7 @@ class router
      */
     protected function setThemeRoot()
     {
-        $this->themeRoot = $this->appRoot . 'www' . $this->pathFix . 'theme' . $this->pathFix;
+        $this->themeRoot = $this->appRoot . 'www' . DS . 'theme' . DS;
     }
 
     /**
@@ -565,17 +557,6 @@ class router
         if(isset($this->config->timezone)) date_default_timezone_set($this->config->timezone);
     }
 
-    /**
-     * Get the $pathFix var
-     * 
-     * @access public
-     * @return string
-     */
-    public function getPathFix()
-    {
-        return $this->pathFix;
-    }
-
     /**
      * Get the $basePath var
      * 
@@ -995,7 +976,7 @@ class router
      */
     public function setControlFile($exitIfNone = true)
     {
-        $this->controlFile = $this->moduleRoot . $this->moduleName . $this->pathFix . 'control.php';
+        $this->controlFile = $this->moduleRoot . $this->moduleName . DS . 'control.php';
         if(!is_file($this->controlFile))
         {
             $this->triggerError("the control file $this->controlFile not found.", __FILE__, __LINE__, $exitIfNone);
@@ -1026,7 +1007,7 @@ class router
     public function getModulePath($moduleName = '')
     {
         if($moduleName == '') $moduleName = $this->moduleName;
-        return $this->getModuleRoot() . strtolower(trim($moduleName)) . $this->pathFix;
+        return $this->getModuleRoot() . strtolower(trim($moduleName)) . DS;
     }
 
     /**
@@ -1039,7 +1020,7 @@ class router
      */
     public function getModuleExtPath($moduleName, $ext)
     {
-        return $this->getModuleRoot() . strtolower(trim($moduleName)) . $this->pathFix . 'ext' . $this->pathFix . $ext . $this->pathFix;
+        return $this->getModuleRoot() . strtolower(trim($moduleName)) . DS . 'ext' . DS . $ext . DS;
     }
 
     /**
@@ -1351,7 +1332,7 @@ class router
 
         /* Search in $coreLibRoot. */
         $classFile = $this->coreLibRoot . $className;
-        if(is_dir($classFile)) $classFile .= $this->pathFix . $className;
+        if(is_dir($classFile)) $classFile .= DS . $className;
         $classFile .= '.class.php';
         if(!helper::import($classFile)) $this->triggerError("class file $classFile not found", __FILE__, __LINE__, $exit = true);
 
@@ -1476,7 +1457,7 @@ class router
     public function loadLang($moduleName)
     {
         $modulePath   = $this->getModulePath($moduleName);
-        $mainLangFile = $modulePath . 'lang' . $this->pathFix . $this->clientLang . '.php';
+        $mainLangFile = $modulePath . 'lang' . DS . $this->clientLang . '.php';
         $extLangPath  = $this->getModuleExtPath($moduleName, 'lang');
         $extLangFiles = helper::ls($extLangPath . $this->clientLang, '.php');
 
diff --git a/module/convert/converter/bugfree.php b/module/convert/converter/bugfree.php
index 23694f7ad2..43f4a6dfe1 100644
--- a/module/convert/converter/bugfree.php
+++ b/module/convert/converter/bugfree.php
@@ -58,7 +58,7 @@ class bugfreeConvertModel extends convertModel
      */
     public function setPath()
     {
-        $this->filePath = realpath($this->post->installPath) . $this->app->getPathFix() . 'BugFile' . $this->app->getPathFix();
+        $this->filePath = realpath($this->post->installPath) . DS . 'BugFile' . DS;
     }
 
     /**
diff --git a/module/convert/converter/redmine.php b/module/convert/converter/redmine.php
index 5686a77cb5..4ed5d3c50c 100644
--- a/module/convert/converter/redmine.php
+++ b/module/convert/converter/redmine.php
@@ -58,7 +58,7 @@ class redmineConvertModel extends convertModel
      */
     public function setPath()
     {
-        $this->filePath = realpath($this->post->installPath) . $this->app->getPathFix() . 'files' . $this->app->getPathFix();
+        $this->filePath = realpath($this->post->installPath) . DS . 'files' . DS;
     }
 
     /**
diff --git a/module/dev/model.php b/module/dev/model.php
index 9ffe57914f..c46d651d88 100644
--- a/module/dev/model.php
+++ b/module/dev/model.php
@@ -127,7 +127,7 @@ class devModel extends model
      */
     public function getAPIs($module)
     {
-        $fileName = $this->app->getModuleRoot() . $module . $this->app->getPathFix() . 'control.php';
+        $fileName = $this->app->getModuleRoot() . $module . DS . 'control.php';
         if($module != 'common' and $module != 'dev')
         {
             include $fileName;
diff --git a/module/editor/model.php b/module/editor/model.php
index fb0e7d8821..d94829bde4 100644
--- a/module/editor/model.php
+++ b/module/editor/model.php
@@ -11,8 +11,6 @@
  */
 class editorModel extends model
 {
-    private $pathFix = DIRECTORY_SEPARATOR;
-
     /**
      * Get all modules 
      * 
@@ -48,7 +46,7 @@ class editorModel extends model
         foreach($moduleFiles as $moduleFile)
         {
             if($moduleFile == '.' or $moduleFile == '..' or $moduleFile == '.svn') continue;
-            $moduleFullFile = $moduleFullDir . $this->pathFix . $moduleFile;
+            $moduleFullFile = $moduleFullDir . DS . $moduleFile;
             if($moduleFile == 'control.php' or $moduleFile == 'model.php')
             {
                 $allModules[$moduleFullDir][$moduleFullFile] = $this->analysis($moduleFullFile);
@@ -60,7 +58,7 @@ class editorModel extends model
             elseif(is_dir($moduleFullFile)) 
             {
                 $ext = ($moduleFile == 'js' or $moduleFile == 'css') ? $moduleFile : 'php';
-                $extFiles = glob($moduleFullFile . $this->pathFix . "*.$ext");
+                $extFiles = glob($moduleFullFile . DS . "*.$ext");
                 if(!empty($extFiles))
                 {
                     foreach($extFiles as $fileName) $allModules[$moduleFullDir][$moduleFullFile][$fileName] = basename($fileName);
@@ -89,7 +87,7 @@ class editorModel extends model
         foreach($extensionDirs as $extensionDir)
         {
             if($extensionDir == '.' or $extensionDir == '..' or $extensionDir == '.svn') continue;
-            $extensionFullDir = $extPath . $this->pathFix . $extensionDir;
+            $extensionFullDir = $extPath . DS . $extensionDir;
             if(is_dir($extensionFullDir))
             {
                 $extensionList[$extensionFullDir] = array();
@@ -104,7 +102,7 @@ class editorModel extends model
                 foreach($extensionFiles as $extensionFile)
                 {
                     if($extensionFile == '.' or $extensionFile == '..' or $extensionFile == '.svn') continue;
-                    $extensionFullFile = $extensionFullDir . $this->pathFix . $extensionFile;
+                    $extensionFullFile = $extensionFullDir . DS . $extensionFile;
                     $extensionList[$extensionFullDir][$extensionFullFile] = $extensionFile;
                 }
             }
@@ -129,7 +127,7 @@ class editorModel extends model
         if(!$isExtension) $moduleFiles = $moduleFiles[$filePath];
         foreach($this->config->editor->$sort as $sort)
         {
-            $sortKey = empty($sort) ? $filePath : $filePath . $this->pathFix . $sort;
+            $sortKey = empty($sort) ? $filePath : $filePath . DS . $sort;
             if(array_key_exists($sortKey, $moduleFiles)) $sortModules[$sortKey] = $moduleFiles[$sortKey];
         }
         return $sortModules;
@@ -149,7 +147,7 @@ class editorModel extends model
         foreach($langDirs as $langDir)
         {
             if($langDir == '.' or $langDir == '..' or $langDir == '.svn') continue;
-            $langFullDir = $extensionFullDir . $this->pathFix . $langDir;
+            $langFullDir = $extensionFullDir . DS . $langDir;
             $fileList[$langFullDir] = array();
             if(is_dir($langFullDir))
             {
@@ -157,7 +155,7 @@ class editorModel extends model
                 foreach($langFiles as $langFile)
                 {
                     if($langFile == '.' or $langFile == '..' or $langFile == '.svn') continue;
-                    $langFullFile = $langFullDir . $this->pathFix . $langFile;
+                    $langFullFile = $langFullDir . DS . $langFile;
                     $fileList[$langFullDir][$langFullFile] = $langFile;
                 }
             }
@@ -175,8 +173,8 @@ class editorModel extends model
     public function analysis($fileName)
     {
         $classMethod = array();
-        $class = strstr($fileName, $this->pathFix . 'module' . $this->pathFix);
-        $class = substr($class, 0, strpos($class, $this->pathFix, 9));
+        $class = strstr($fileName, DS . 'module' . DS);
+        $class = substr($class, 0, strpos($class, DS, 9));
         $class = basename($class);
         if(strpos($fileName, 'model.php') !== false) $class .= 'Model';
         if(!class_exists($class)) include $fileName;
@@ -186,7 +184,7 @@ class editorModel extends model
             $methodName = $method->name;
             if($method->getFileName() != $fileName) continue;
             if($methodName == '__construct') continue;
-            $classMethod[$fileName . $this->pathFix . $methodName] = $methodName;
+            $classMethod[$fileName . DS . $methodName] = $methodName;
         }
         return $classMethod;
     }
@@ -206,7 +204,7 @@ class editorModel extends model
         {
             $module = basename(dirname(key($files)));
 
-            $langFile = dirname(key($files)) . $this->pathFix . 'lang' . $this->pathFix . $this->cookie->lang. '.php';
+            $langFile = dirname(key($files)) . DS . 'lang' . DS . $this->cookie->lang. '.php';
             if(file_exists($langFile))
             {
                 if(!isset($lang)) $lang = new stdclass();
@@ -268,7 +266,7 @@ class editorModel extends model
         {
             $file = "<span title='$fileName'>$fileName</span>";
         }
-        if(strpos($filePath, $this->pathFix . 'ext' . $this->pathFix) !== false)
+        if(strpos($filePath, DS . 'ext' . DS) !== false)
         {
             switch($fileName)
             {
@@ -305,7 +303,7 @@ class editorModel extends model
     {
         $tree = '';
         $file = "<span title='$file'>$file</span>";
-        if(strpos($filePath, $this->pathFix . 'ext' . $this->pathFix) !== false)
+        if(strpos($filePath, DS . 'ext' . DS) !== false)
         {
             $tree .= "$file " . html::a($this->getExtendLink($filePath, "edit"), $this->lang->edit, 'editWin');
             $tree .= html::a(inlink('delete', 'path=' . helper::safe64Encode($filePath)), $this->lang->delete, 'hiddenwin') . "\n";
@@ -370,7 +368,7 @@ class editorModel extends model
         $fileContent = $this->post->fileContent;
         if(get_magic_quotes_gpc()) $fileContent = stripslashes($fileContent);
         $dirPath = dirname($filePath);
-        $extFilePath = substr($filePath, 0, strpos($filePath, $this->pathFix . 'ext' . $this->pathFix) + 4);
+        $extFilePath = substr($filePath, 0, strpos($filePath, DS . 'ext' . DS) + 4);
         if(!is_dir($dirPath) and is_writable($extFilePath)) mkdir($dirPath, 0777, true);
         if(is_writable($dirPath))
         {
@@ -453,8 +451,8 @@ EOD;
      */
     public function newControl($filePath)
     {
-        $className = strstr($filePath, $this->pathFix . 'module' . $this->pathFix);
-        $className = substr($className, 0, strpos($className, $this->pathFix, 9));
+        $className = strstr($filePath, DS . 'module' . DS);
+        $className = substr($className, 0, strpos($className, DS, 9));
         $className = basename($className);
         $methodName = basename($filePath, '.php');
         return $fileContent = <<<EOD
@@ -534,37 +532,37 @@ EOD;
     public function getSavePath($filePath, $action)
     {
         $fileName   = empty($_POST['fileName']) ? '' : trim($this->post->fileName);
-        $moduleName = strstr($filePath, $this->pathFix . 'module' . $this->pathFix);
-        $moduleName = substr($moduleName, 0, strpos($moduleName, $this->pathFix, 9));
+        $moduleName = strstr($filePath, DS . 'module' . DS);
+        $moduleName = substr($moduleName, 0, strpos($moduleName, DS, 9));
         $moduleName = basename($moduleName);
-        $extPath    = $this->app->getModuleRoot() . $moduleName . $this->pathFix . 'ext' . $this->pathFix;
+        $extPath    = $this->app->getModuleRoot() . $moduleName . DS . 'ext' . DS;
         switch($action)
         {
         case 'extendModel':
             $fileName = empty($fileName) ? strtolower(basename($filePath)) . '.php' : $fileName;
-            return $extPath . 'model' . $this->pathFix . $fileName;
+            return $extPath . 'model' . DS . $fileName;
         case 'extendControl':
             $fileName = strtolower(basename($filePath)) . '.php';
-            return $extPath . 'control' . $this->pathFix . $fileName;
+            return $extPath . 'control' . DS . $fileName;
         case 'override':
             $fileName = basename($filePath);
-            return $extPath . 'view' . $this->pathFix . $fileName;
+            return $extPath . 'view' . DS . $fileName;
         case 'extendOther':
             $editName = basename($filePath);
             $fileName = empty($fileName) ? $editName: $fileName;
-            if($editName == 'config.php') return $extPath . 'config' .$this->pathFix . $fileName;
-            elseif(strpos($editName, '.php') !== false) return $extPath . 'lang' . $this->pathFix . str_replace('.php', '', $editName) . $this->pathFix . $fileName;
-            else return $extPath . substr($editName, strrpos($editName, '.') + 1) . $this->pathFix . substr($editName, 0, strrpos($editName, '.')) . $this->pathFix . $fileName;
+            if($editName == 'config.php') return $extPath . 'config' .DS . $fileName;
+            elseif(strpos($editName, '.php') !== false) return $extPath . 'lang' . DS . str_replace('.php', '', $editName) . DS . $fileName;
+            else return $extPath . substr($editName, strrpos($editName, '.') + 1) . DS . substr($editName, 0, strrpos($editName, '.')) . DS . $fileName;
         default:
             if(empty($fileName)) die(js::error($this->lang->editor->emptyFileName));
             $action = strtolower(str_replace('new', '', $action));
-            if($action == 'hook') return $extPath . 'view' . $this->pathFix . $fileName;
-            elseif($action == 'method') return $extPath . basename($filePath, '.php') . $this->pathFix . $fileName;
-            elseif($action == 'extend') return $filePath . $this->pathFix . $fileName;
-            elseif($action == 'config') return $extPath . 'config' . $this->pathFix . $fileName;
-            elseif($action == 'js') return $extPath . 'js' . $this->pathFix . substr($fileName, 0, strrpos($fileName, '.')) . $this->pathFix . $fileName;
-            elseif($action == 'css') return $extPath . 'css' . $this->pathFix . substr($fileName, 0, strrpos($fileName, '.')) . $this->pathFix . $fileName;
-            else return $extPath . 'lang' . $this->pathFix . str_replace('_', '-', $action) . $this->pathFix . $fileName;
+            if($action == 'hook') return $extPath . 'view' . DS . $fileName;
+            elseif($action == 'method') return $extPath . basename($filePath, '.php') . DS . $fileName;
+            elseif($action == 'extend') return $filePath . DS . $fileName;
+            elseif($action == 'config') return $extPath . 'config' . DS . $fileName;
+            elseif($action == 'js') return $extPath . 'js' . DS . substr($fileName, 0, strrpos($fileName, '.')) . DS . $fileName;
+            elseif($action == 'css') return $extPath . 'css' . DS . substr($fileName, 0, strrpos($fileName, '.')) . DS . $fileName;
+            else return $extPath . 'lang' . DS . str_replace('_', '-', $action) . DS . $fileName;
         }
     }
 }
diff --git a/module/install/model.php b/module/install/model.php
index 2f09b6e8e5..4a446294dd 100644
--- a/module/install/model.php
+++ b/module/install/model.php
@@ -159,7 +159,7 @@ class installModel extends model
      */
     public function getDataRoot()
     {
-        $result['path']    = $this->app->getAppRoot() . 'www' . $this->app->getPathFix() . 'data';
+        $result['path']    = $this->app->getAppRoot() . 'www' . DS . 'data';
         $result['exists']  = is_dir($result['path']);
         $result['writable']= is_writable($result['path']);
         return $result;
@@ -173,7 +173,7 @@ class installModel extends model
      */
     public function checkDataRoot()
     {
-        $dataRoot = $this->app->getAppRoot() . 'www' . $this->app->getPathFix() . 'data';
+        $dataRoot = $this->app->getAppRoot() . 'www' . DS . 'data';
         return $result = (is_dir($dataRoot) and is_writable($dataRoot)) ? 'ok' : 'fail';
     }
 
@@ -354,7 +354,7 @@ class installModel extends model
      */
     public function createTable($version)
     {
-        $dbFile = $this->app->getAppRoot() . 'db' . $this->app->getPathFix() . 'zentao.sql';
+        $dbFile = $this->app->getAppRoot() . 'db' . DS . 'zentao.sql';
         $tables = explode(';', file_get_contents($dbFile));
         foreach($tables as $table)
         {
@@ -425,7 +425,7 @@ class installModel extends model
      */
     public function importDemoData()
     {
-        $demoDataFile = $this->app->getAppRoot() . 'db' . $this->app->getPathFix() . 'demo.sql';
+        $demoDataFile = $this->app->getAppRoot() . 'db' . DS . 'demo.sql';
         $insertTables = explode(";\n", file_get_contents($demoDataFile));
         foreach($insertTables as $table)
         { 
diff --git a/module/upgrade/model.php b/module/upgrade/model.php
index d0f96a1917..7b38975413 100644
--- a/module/upgrade/model.php
+++ b/module/upgrade/model.php
@@ -638,7 +638,7 @@ class upgradeModel extends model
      */
     public function getUpgradeFile($version)
     {
-        return $this->app->getAppRoot() . 'db' . $this->app->getPathFix() . 'update' . $version . '.sql';
+        return $this->app->getAppRoot() . 'db' . DS . 'update' . $version . '.sql';
     }
 
     /**