Computer "not authorized" to play song I just purchased on said computer

Hello!

I just bought an album off of the itunes store and one song off of the album will not play.

When attempting to play it I get a prompt that says the computer is not authorized to play it.

I then put in my account information to authorize it and it says "This computer had been previously authorized, it has be re-authorized. Including this one, you have authorized 5 computers out of your available five." If I try to play the song again it just continues with a never ending loop of me attempting to authorize it.

I have only authorized the song on this computer because I purchased it through my itunes on this computer. I only have one account and didn't use a different one to buy it.

I just want to play the music I purchased, thanks for any help.