Are they .mp3 files you ripped from CD’s or did you download them from somewhere? From a legitimate/legal site, or from a P2P site? Have you run ChkDsk on them to look for corruption?
Tip: If you tell us anything and everything you can about the problem off the bat, we wouldn’t have to play 20 questions back & forth. It’s been 2 weeks since you posted your original question/problem. How soon do you want to get it fixed? 
