CD scratched or otherwise damaged?
Are you able to copy the movie to your hard drive and play it in Windows Media Player? Also, if you can, try playing the movie on a different computer (maybe a different drive will have better luck reading the file), and if that works, maybe you can make a copy or image of the disc there and use that.
Worst case... Post a link to your save file and see if someone will play past the trouble spot for you.