CodeIgniter 500內部服務器錯誤子域

我有一個關於500內部服務器錯誤的問題。這裏是故事CodeIgniter 500內部服務器錯誤子域

我做了一個子域，並把我的基於CI的網站放在那裏。
我嘗試訪問它，它可以工作，但有一些錯誤需要修復。
當我修復了這個錯誤之後，我刪除了我的子域中的所有文件並重新上傳。
我嘗試訪問它，但它顯示500內部服務器錯誤。我檢查了.htaccess文件，沒有錯，因爲我從來沒有改變它。

這裏是我的htaccess文件

RewriteEngine on 
RewriteCond $1 !^(index\.php|assets|css|js|images|robots\.txt) 
RewriteRule ^(.*)$ /index.php/$1 [L]

這裏是我的CI配置文件

$config['base_url'] = ''; 
$config['index_page'] = '';

，當我在我的cPanel的錯誤日誌檢查，當我嘗試訪問我的網站。它顯示像這樣：

[Sat May 12 20:48:23 2012] [error] [client 180.247.155.67] SoftException in Application.cpp:254: File "/home/*****/public_html/sipr/index.php" is writeable by group 
[Sat May 12 20:48:23 2012] [error] [client 180.247.155.67] SoftException in Application.cpp:254: File "/home/*****/public_html/sipr/index.php" is writeable by group 
[Sat May 12 20:48:21 2012] [error] [client 180.247.155.67] SoftException in Application.cpp:254: File "/home/*****/public_html/sipr/index.php" is writeable by group 
[Sat May 12 20:48:21 2012] [error] [client 180.247.155.67] SoftException in Application.cpp:254: File "/home/*****/public_html/sipr/index.php" is writeable by group 
[Sat May 12 20:48:20 2012] [error] [client 180.247.155.67] SoftException in Application.cpp:254: File "/home/*****/public_html/sipr/index.php" is writeable by group 
[Sat May 12 20:48:20 2012] [error] [client 180.247.155.67] SoftException in Application.cpp:254: File "/home/*****/public_html/sipr/index.php" is writeable by group

我試圖通過本地訪問我的網站，它工作正常。我的本地站點地址是