Windows Movie Maker

When I split a video and delete the portion I do not want, the remaining portion freezes when I try to resume playing. It does not freeze on the next frame, it freezes with the last frame of that particular video. If I skip forward in review the video will start to play normally but I still can't get the initial frozen frame out of the video...splitting and cutting it out doesn't correct the problem because the next split carries the same problem. Is this a known problem with movie maker? Am I missing an update? Or is the program corrupting my videos?