Applications :: ITunes Purchased Music Error?

So had just sent in my MBP with dead logic board. Got it back. Everything works great except all my purchased music on iTunes needed to be re-authorized. No problem, I know the password. (By the way the account is an AOL account) So I type in my password, it recognizes it as being correct but would like me to update my account for use with an Apple ID. This is also fine (although I remember doing this a few months ago already. Whatever I'll do it again.)