All the music files i have downloaded from Limewire work with the limewire player. When I try to play some of the files with Windows Media player, some files say

"Windows Media Player cannot play the file. The Player might not support the file type or might not support the codec that was used to compress the file."

And then when I try to play the exact same file on other programs such as MusicMatch, it plays perfectly. Anyone know whats up? And how to fix it?