VS9 Freezing/Stopping

[Dude213]

Ok... I am working on a video in VS9. On Wednesday, I edited it. Opened it on Thursday, edited it again and saved it. Today, I go to open it and it opens fine. I start to play a clip, and 10 seconds into it, the screen freezes. The video plays on, but the buttons and everything are just frozen. About 10 seconds later, VS9 just completely quits, with no error message or anything. HELP!!

Sys. Specs: (I don't see why these would be needed, but here is a quick sys. overview anyway...)
AMD 3200+
512 DDR
My working project is saved on a 60 gb secondary.
Anything else you need to know?

Thanks in advance