Activating CoursePress Pro breaks Artisteer Theme

I have Artisteer 4 and I use it to create WordPress Themes. The theme on my site has a 1000 px page centered horizontally on the screen. Activating CoursePress Pro breaks this centeredness of the page, so that all content is left-justified on the screen.

Also, after pressing “Start Learning” button on a course description, nothing at all is displayed on the page. No unit page, no learning page, nothing at all.

I can send you the WordPress Theme created with Artisteer if you like.

Because of this, I have canceled my WPMU membership, which still offers me access until October 22. Because of this I have decided to use Adobe Captivate to create my courseware instead.