Video Tutorials don't play

[eluser]CreedFeed[/eluser]
I'm on Windows XP using both IE7 and Firefox 2... I've downloaded and installed the latest version of the Quicktime player. When i load one of the tutorials I first get an alert box that says something about an error occured with the Quicktime plugin, and then my browser crashes. I even downloaded the blog.mov file to my computer. When I open it up in Quicktime it plays an intro for about 10 seconds and then just stops playing.