Have you tried playing the files using another player? Try VLC player. It's free & will play most file types. Check the thread below for a download link.
http://www.gnutellaforums.com/tips-t...p3-fixers.html
If VLC won't play the file then chances are that it's a dodgy file.

There have been infected files shared in the past, which show as mp3.exe... not real mp3 files at all. Make sure that you scan all downloaded files with your AV, before opening the file

The links below have more info.

Virus thread: Typical virus spam file sizes - Make a note of them (click on blue link to see)

* WARNING: Viruses on network you should be aware of ! *

How to find music