My wife bought me an iTunes gift card for Christmas and I downloaded some musicthat works great on my home computer. The problem is I keep music on a 4 gig jump drive that I can plug into the CD player in my truck and it will not play in my truck. It is just the songs I bought not the CDs I downloaded. On my work computer I had to authorize the use of the song to be played on it. I am sure that is why it wont play in the truck. Anyone know a way around that?