Problema con un anti dos

Il plugin si chiama lamer savar,

misi il plugin in /inc/plugins e l'injection_scanner nel root del forum (vicino a Upload)

il blocco note diceva:

Upload the contents of the injection_scanner directory to a mybb root directory of your choice on your webserver.
Upload inc/plugins/lamersavar.php to inc/plugins directory.
CHMOD inc/class_parser.php, injection_scanner/.htaccess, injection_scanner/scan.php and injection_scanner/config.php to 777.
Visit the URL to the install.php file. It should be something like: http://www.yoursite.com/injection_scanner/install.php.
Fill out the form, write down the value in the Absolute Path form field, and click the install button. You should not need to change the Exploit List or Absolute Path.
Go To Forum Admin Panel. Configuration > Plugins and Activate plugin.
Visit the index.php and add the query string ?cmd= to the end of the filename (http://www.yoursite.com/index.php?cmd=1). If your IP address is banned or logged, the script is working.
Visit the URL to the injection scanner admin login page. It should be something like: http://www.yoursite.com/injection_scanner/admin/. Log in and delete the entry containing your IP address.
Revert CHMOD inc/class_parser.php, injection_scanner/.htaccess and injection_scanner/config.php to default value.

Important Note: When deactivating plugin make sure your inc/class_parser.php, injection_scanner/.htaccess and injection_scanner/config.php files’ CHMOD is 777. If not you cannot deactivate the plugin. After deactivating plugin you can revert CHMOD to default value.

Note: I am only customize the mybb (http://www.hotscripts.com/Detailed/77967.html)

se vado in http://miosito.altervista.org/injection_scanner/install

appaio davanti a questa schermata:



se metto i dati invece succede questo:



ora il guasto è che, non mi fa andare nella index mi dice:

MyBB has experienced an internal error and cannot continue.

Error Type:
MyBB Error (41)

insomma, l'index non va, l'install nemmeno.. e mi sa che devo rifare il forum intero non avendo i backup.. sapete come risolvere?, quando attivai il plugin, mi diceva che il forum sarebbe stato disponibile dopo qualche modifica dell'admin, adesso invece dopo aver smanettato nel ftp mi da l'errore 41 -.-