Bootstrap Error

[maddenminds]

Whenever i tried to install any mod i get a warning related to class bootstrap. Below i have shown what warning i got after installing NBF chatbox :-

Warning: require_once([path]/mgc_cb_evo/classes/class_core.php) [function.require-once]: failed to open stream: No such file or directory in [path]/includes/class_bootstrap.php(93) : eval()'d code on line 4

Fatal error: require_once() [function.require]: Failed opening required '/home/themadde/public_html/forums/mgc_cb_evo/classes/class_core.php' (include_path='.:/usr/local/php5/lib/php') in /home/themadde/public_html/forums/includes/class_bootstrap.php(93) : eval()'d code on line 4

Need help or any suggestion

[Videx]

You should ask over in the mod's thread. I'm not sure what the NBF chatbox is, but the error seems to be coming from MGC chatbox. Maybe you had it installed before and neglected to completely uninstall it?