Authorization issue - Purchased a song

good day - I just purchased a song and when I went to my Library to play the song it states - This computer is not authorized to play "You Make Loving Fun" by Fleetwood Mac and it states would you like to authorize this computer it? I put my Apple ID - and password. Click on Authorize - then I get another message that states - This computer had previously been authorized, it has been re-authorized. Including this one, you have authorized 3 computers out of your available 5. We just got a new PC about a month ago. I did purchase a song before this song and had no problems with it. It plays on this computer. But for some reason the Fleetwood Mac doesn't.