MyBB Hacks

Again, its not a coding question. Actually I'm facing some errors in ACP > Plugin manager. When I tried to go in "Plugin Manager" instead of opening the Manager, it downloads the "index.php" file on computer, and the Manager doesn't open. That downloaded "index.php" file is empty. Every other links in ACP > configuration is working properly. Just a problem in http://domain.com/admin/index.php?module=config-plugins page.

I 'm using FireFox latest version.

Help Needed !!!

Probably a fault with a plugin - you'll need to remove it.

Thanks for the help !