Courses plugin messed up my website

Hello,

I had a big problem while loading the plugin CoursePress Pro by using the WPMU dashboard. It was creating me an additional "MArketPRess" option that asked me for an update and when I did it, it made my website go blank. I have installed all the WPMU plugins and was able to upload it via ftp, without using the WPMU Dashboard plugin (which slows down my website btw.). Right now I am able to see the courses plugin in the Plugin section (before it was not showing up) but it is totaly messing up my website as you can see below. When I disable the CoursePress Pro plugin everything is working fine.

http://www.sedziapilkarski.pl/videos/kontrowersje/hamburg-hoffenheim-ocena-gry-lokciem
there should be a video visible here, but its not.

http://www.sedziapilkarski.pl/
There are huge gabs between latest news display below the main banner