.htaccess and other redirectioning error

[eluser]piper-coda[/eluser]
Hi there, a few months using CI but its my first post.

I uploaded my project to the webserver, it works fine on the local project but when I upload it I get this error:

Fatal error: Class controller: Cannot inherit from undefined class ci_base in /mnt/Target01/335170/338577/www.campaignmanager.com/web/content/system/libraries/Config.php on line 30

Any ideas would be greatly appreciated.