Okay, here's the issue. I changed my account name for my iTunes account, and now, it seems I cannot access much of the stuff I have in my library. It says that I am no authorized to play and such. Any help would be great.
(Before I changed my account I also had to wipe all of the authorized computers, but I did it on my mac, the one with my library, so it was automatically authorized I presume. I only saw problems after changing my account name, and had none before.)

(Before I changed my account I also had to wipe all of the authorized computers, but I did it on my mac, the one with my library, so it was automatically authorized I presume. I only saw problems after changing my account name, and had none before.)