You probably need to d/load some codecs for the files to play properly. Do they play at all when you try them? This thread has links to different codec packs you can d/load. Try the one for vista:
http://www.gnutellaforums.com/tips-t...p3-fixers.html
Another option is to try a different player. Try using
VLC media player, it has the codecs built in and will play most file types. It's a good player to keep around for those stubborn files that you can't get to play.
It could also be that the files are fakes. There are lots of tips in these threads:
See:
Fake files showing up in search results
Also:
Problems with the search How to find music(and video)