Logged into Admin can't access Media Manager

Hello!

I created a Media Collection a few nights ago for a cart, and now when I try to access it to edit it and I click on Media Manager I get the following error message. I am not sure how to fix the problem. I tried re-uploading a fresh version of class.base.php as well as the whole classes file and the hole includes file, but to no avail. What should I do so I can use the media manager again?

Fatal error: Cannot redeclare class base in... includes/classes/class.base.php on line 17

v1.3.8 [2008-10-25 15:06:31] (Fresh Installation)
Server OS: Linux 2.4.21-53.ELsmp
Database: MySQL 4.1.22-max-log
Database Host: p41mysql177.secureserver.net (10.6.171.222)

Thank you!
:blink: