Work through all of the steps (ideas) listed at http://forums.adobe.com/thread/459220?tstart=0
If your problem isn't fixed after you follow all of the steps, report back with ALL OF THE DETAILS asked for in the FINALLY section, the questions at the end of the troubleshooting link
Long File Names or odd characters Cause Crashing http://forums.adobe.com/thread/588273
And #4 Here http://forums.adobe.com/thread/666558?tstart=0
And This Message Thread http://forums.adobe.com/thread/665641?tstart=0
Welcome to the forum.
Along with John T's links and the questions posed, take a look at this ARTICLE for the types of info that would be so very useful in diagnosing what is happening with the program and your Project/Assets, on your computer.
There could be a lot of different causes, but the more info provided, the easier it will be for someone to spot the exact problem.
[Edit] Oops, John T. linked to that same article. I thought that he'd just linked to the PrPro-wiki steps. He's just too good and quick too!
Message was edited by: Bill Hunt - Added [Edit]