diff --git a/framework/helper.class.php b/framework/helper.class.php
index 76ba1c4730..054ed9b7e5 100644
--- a/framework/helper.class.php
+++ b/framework/helper.class.php
@@ -157,7 +157,7 @@ class helper
         if(empty($extFiles)) return $mainModelFile;
 
         /* Else, judge whether needed update or not .*/
-        $mergedModelFile = $app->getTmpRoot() . 'model' . $app->getPathFix() . $app->site->code . '.' . $moduleName . '.php';
+        $mergedModelFile = $app->getTmpRoot() . 'model' . $app->getPathFix() . $moduleName . '.php';
         $needUpdate      = false;
         $lastTime        = file_exists($mergedModelFile) ? filemtime($mergedModelFile) : 0;
         foreach($extFiles as $extFile)
@@ -186,8 +186,8 @@ class helper
             foreach($extFiles as $extFile)
             {
                 $extLines = trim(file_get_contents($extFile));
-                $extLines = ltrim($extLines, '<?php');
-                $extLines = rtrim($extLines, '?>');
+                if(strpos($extLines, '<?php') !== false) $extLines = ltrim($extLines, '<?php');
+                if(strpos($extLines, '?>')    !== false) $extLines = rtrim($extLines, '?>');
                 $modelLines .= $extLines . "\n";
             }
 
diff --git a/framework/router.class.php b/framework/router.class.php
index 8cd842311b..0e63892bf3 100755
--- a/framework/router.class.php
+++ b/framework/router.class.php
@@ -304,6 +304,7 @@ class router
 
         $this->loadClass('front',  $static = true);
         $this->loadClass('filter', $static = true);
+        $this->loadClass('dao',    $static = true);
     }
 
     /**