diff --git a/framework/control.class.php b/framework/control.class.php
index 48ed03ffbe..e896847264 100755
--- a/framework/control.class.php
+++ b/framework/control.class.php
@@ -217,7 +217,7 @@ class control
         $modelFile = helper::setModelFile($moduleName);
 
         /* If no model file, try load config. */
-        if(!file_exists($modelFile)) 
+        if(!helper::import($modelFile)) 
         {
             $this->app->loadConfig($moduleName, false);
             $this->app->loadLang($moduleName);
@@ -225,7 +225,6 @@ class control
             return false;
         }
 
-        helper::import($modelFile);
         $modelClass = class_exists('ext' . $moduleName. 'model') ? 'ext' . $moduleName . 'model' : $moduleName . 'model';
         if(!class_exists($modelClass)) $this->app->error(" The model $modelClass not found", __FILE__, __LINE__, $exit = true);
 
@@ -274,7 +273,7 @@ class control
         $extHookFiles = helper::ls($viewExtPath, '.hook.php');
 
         $viewFile = file_exists($extViewFile) ? $extViewFile : $mainViewFile;
-        if(!file_exists($viewFile)) $this->app->error("the view file $viewFile not found", __FILE__, __LINE__, $exit = true);
+        if(!is_file($viewFile)) $this->app->error("the view file $viewFile not found", __FILE__, __LINE__, $exit = true);
         if(!empty($extHookFiles)) return array('viewFile' => $viewFile, 'hookFiles' => $extHookFiles);
         return $viewFile;
     }
@@ -316,7 +315,7 @@ class control
         $mainCssFile   = $modulePath . 'css' . $this->pathFix . 'common.css';
         $methodCssFile = $modulePath . 'css' . $this->pathFix . $methodName . '.css';
         if(file_exists($mainCssFile))   $css .= file_get_contents($mainCssFile);
-        if(file_exists($methodCssFile)) $css .= file_get_contents($methodCssFile);
+        if(is_file($methodCssFile))     $css .= file_get_contents($methodCssFile);
         return $css;
     }
 
@@ -338,7 +337,7 @@ class control
         $mainJsFile   = $modulePath . 'js' . $this->pathFix . 'common.js';
         $methodJsFile = $modulePath . 'js' . $this->pathFix . $methodName . '.js';
         if(file_exists($mainJsFile))   $js .= file_get_contents($mainJsFile);
-        if(file_exists($methodJsFile)) $js .= file_get_contents($methodJsFile);
+        if(is_file($methodJsFile))     $js .= file_get_contents($methodJsFile);
         return $js;
     }
 
@@ -477,7 +476,7 @@ class control
         $file2Included     = file_exists($actionExtFile) ? $actionExtFile : $moduleControlFile;
 
         /* Load the control file. */
-        if(!file_exists($file2Included)) $this->app->error("The control file $file2Included not found", __FILE__, __LINE__, $exit = true);
+        if(!is_file($file2Included)) $this->app->error("The control file $file2Included not found", __FILE__, __LINE__, $exit = true);
         $currentPWD = getcwd();
         chdir(dirname($file2Included));
         if($moduleName != $this->moduleName) helper::import($file2Included);
diff --git a/framework/helper.class.php b/framework/helper.class.php
index dee92b80b4..1153e5baf1 100644
--- a/framework/helper.class.php
+++ b/framework/helper.class.php
@@ -118,7 +118,7 @@ class helper
      */
     static public function import($file)
     {
-        if(!file_exists($file)) return false;
+        if(!is_file($file)) return false;
         static $includedFiles = array();
         if(!isset($includedFiles[$file]))
         {
@@ -126,7 +126,7 @@ class helper
             $includedFiles[$file] = true;
             return true;
         }
-        return false;
+        return true;
     }
 
     /**
@@ -337,7 +337,6 @@ class helper
         if(!file_exists($issueFile) or !is_readable($issueFile)) return false;
         return stripos(file_get_contents($issueFile), 'centos') !== false;
     }
-
 }
 
 /**
diff --git a/framework/model.class.php b/framework/model.class.php
index 4fec21499d..e816fe9130 100755
--- a/framework/model.class.php
+++ b/framework/model.class.php
@@ -175,9 +175,8 @@ class model
     {
         if(empty($moduleName)) return false;
         $modelFile = helper::setModelFile($moduleName);
-        if(!file_exists($modelFile)) return false;
 
-        helper::import($modelFile);
+        if(!helper::import($modelFile)) return false;
         $modelClass = class_exists('ext' . $moduleName. 'model') ? 'ext' . $moduleName . 'model' : $moduleName . 'model';
         if(!class_exists($modelClass)) $this->app->error(" The model $modelClass not found", __FILE__, __LINE__, $exit = true);
 
diff --git a/framework/router.class.php b/framework/router.class.php
index 6dcef42bbe..14cd6ac89b 100755
--- a/framework/router.class.php
+++ b/framework/router.class.php
@@ -960,7 +960,7 @@ class router
     public function setControlFile($exitIfNone = true)
     {
         $this->controlFile = $this->moduleRoot . $this->moduleName . $this->pathFix . 'control.php';
-        if(!file_exists($this->controlFile))
+        if(!is_file($this->controlFile))
         {
             $this->error("the control file $this->controlFile not found.", __FILE__, __LINE__, $exitIfNone);
             return false;
@@ -1324,13 +1324,13 @@ class router
         if(is_dir($classFile)) $classFile .= $this->pathFix . $className;
         $classFile .= '.class.php';
 
-        if(!file_exists($classFile)) 
+        if(!is_file($classFile)) 
         {
             /* Search in $coreLibRoot. */
             $classFile = $this->coreLibRoot . $className;
             if(is_dir($classFile)) $classFile .= $this->pathFix . $className;
             $classFile .= '.class.php';
-            if(!file_exists($classFile)) $this->error("class file $classFile not found", __FILE__, __LINE__, $exit = true);
+            if(!is_file($classFile)) $this->error("class file $classFile not found", __FILE__, __LINE__, $exit = true);
         }
 
         helper::import($classFile);
@@ -1364,7 +1364,7 @@ class router
         {
             $mainConfigFile = $this->configRoot . 'config.php';
             $myConfig       = $this->configRoot . 'my.php';
-            if(file_exists($myConfig)) $extConfigFiles[] = $myConfig;
+            if(is_file($myConfig)) $extConfigFiles[] = $myConfig;
         }
         else
         {
@@ -1374,7 +1374,7 @@ class router
         }
 
         /* Set the files to include. */
-        if(!file_exists($mainConfigFile))
+        if(!is_file($mainConfigFile))
         {
             if($exitIfNone) self::error("config file $mainConfigFile not found", __FILE__, __LINE__, true);
             if(empty($extConfigFiles)) return false;  //  and no extension file, exit.
@@ -1434,7 +1434,7 @@ class router
         $extLangFiles = helper::ls($extLangPath . $this->clientLang, '.php');
 
         /* Set the files to includ. */
-        if(!file_exists($mainLangFile))
+        if(!is_file($mainLangFile))
         {
             if(empty($extLangFiles)) return false;  // also no extension file.
             $langFiles = $extLangFiles;