I'm currently using Windows Live Movie Maker for windows vista to produce a film for a project but when I add movies/videos only 7 seconds of it appears and it is all black. I have previously used WLMM in January and it worked fine. My file types are all .AVI which is what I used in January so I don't think that there should be a problem there? Also none of the videos are extremely high quality or have a long duration. I also tried to place some of the footage I used back in January to see if that would play and it didn't. It seems to be rejecting all of my files even if they previously worked only 2 months ago. Any suggestions would be appreciated.

Thanks