MarketPress Admin Area

I don't know what happened but when I upload MarketPress and activate it, my admin area goes blank and I can't do anything. It happens directly after pushing the "activate plugin" button and then the only way to access anything in the Admin Area, is to delete it from plugins using my FTP program. Any ideas why this is happening?

The site is http://www.thaprospect.com
The plugins I am currently using are:
-Admin Trim Interface
-BP Gallery
-BP Group Management
-BP Group Reviews
-BP Xtra Signup
-BuddyPress
-BuddyPress Registration Groups
-Contact Form 7
-Custom Post Type UI
-Floating Social
-GD Star Rating
-In Post Ads
-Lightbox Plus
-Membership Premium
-Permalink Editor
-WP Live CSS Editor

Thanks guys!