Movie Maker works fine and everything works, but as soon as I save it as a project and open it up again to work on it, it has so many bugs or glitches, I'm not sure what it is... For instance, I saved a project after working on it for about 20 minutes, and when I opened it up again and I split a video, it froze and said "Windows Movie Maker is not responding", stuff like that. I only get problems like this after I save something as a project and open it up again. Help?