I figured it was time to reformat my PC and switch to a Raptor, so I saved all my documents. Inside that folder was all my itunes that I bought from the music store. After swapping in the new HD, I copied the My Documents folder to it. I downloaded itunes, which found all the songs I've purchased. Then it asked me to authorize this "new computer" which I did. Still none of the songs will play. Nor will any of the previews play at the music store. It just stays at 0:00. I've tried reinstalling without any success and I'm using the latest version of itunes and QT. Any help?