hi. i got a new computer, the iPhone synced successfully, but songs won't play. it tells me "this computer is not authorized to play this song" and then has me log into some super old email account that my ex uses now, but all the songs have been purchased on my office computer, my card and my own email-both of which he has no access to. how can I reset the authorizing email for my songs? (ps: when i try to authorize with my current email, it tels me "you have authorized 2 of 5 computers" but refuses to play the highlighted song). thanks guys 