Maybe someone can help. Sorry it's not directly related to Limewire

I had put 2 songs from limewire into a "loop file" on garage band - I wanted to adjust some stuff on it for a slideshow I'm doing in Iphoto. Somehow I pressed onto the song file in garage band and *poof! My sound is gone -not just in garage band, but Limewire *and Itunes. It just makes this popping sound when the song starts and then nothing. Any advice would be appreciated!

Thanks,
Megan