I bought an album, but one of the songs had trouble downloading. I re-downloaded it and now I still cannot play it, I get stuck in an "Authorize device" loop.

This device has been authorized for my apple account for quite sometime, and it says so when I log in to authorize it. But after "authorizing" when I double click my song it once again asks me to "Authorize device" by login in with my apple I.d. This is very frustrating and I want what I have already paid for.