Problems with MU-Plugins showing up

I’m going to pick this plugin but the problem I’m having is straight across. I’m installing the plugins manually to the WPMU Plugins folders. It shows there but yet I can’t find any of the information in the Options menu.

I’m having the same problem with every plugin that goes into the WPMU plugins folder. I thinking it is probably something fairiy simple but I don’t know. Maybe .htaccess file? Everything on the blog seems to be working although I’m just at the beginning stages. Just completing my main blog design.

I’m using WPMU 2.92 and Atahualpa 3.4.6 Theme. According to their forum they have many WPMU users with that theme.