I burn a Data CD or DVD with Nero or with Dell's delivered software for burning cds (Sonic something). I am trying to copy all my mp3s from my laptop to my desktop via burning CDs or DVDs, but when I try to play the mp3s on my desktop (or any other computer I've tried) I get an error message and the file won't play. Why?!? This worked on my old Sony laptop... (grr)