I am having a problem playing videos from the Solidworks World 2011 presentations.

The videos usually play for about 10 minutes and then they stop and go back to the beginning. 

At one point I thought it might have something to do with the browser.  I was using Chrome and when I changed to IE 9 I was able to get one video to play all the way through.  But I am now using IE 9 and I just had the same problem on a different video from the presentations that I am trying to watch.

This is happening on both my Win7 Home Premium 64 and Win7 Pro 64 computers.

Does anybody know of any solutions to this problem?