My son received a new iPod nano 5th gen. for christmas - he has purchased and downloaded some songs off the itunes store (we have downloaded the site, and opened an account), but we can't seem to get the songs to show up on his iPod. When we go to the "downloads" on his account, I can see all the songs he has purchased on the computer screen, but am not sure how to get it to the iPod. (we had the iPod plugged in with the usb cable while we were downloading ) Help!