Course materials not streaming

Since Friday, we've been having problems with the newly added course on iTunes U stream in iTunes on Windows. Tried playing other materials from other pages/universities it works fine. I could still subscribe and download the materials which will show up in the library (and then be able to stream from there once I hit play). But streaming it from the main page of the course itself is not working. I noticed it with the other course under my university where when you hit play the play button just keeps loading but nothing's happening. However the materials from the Top Downloads section streams just fine.

Has anybody else encountered this problem?