I purchased an album, but it won't play (not authorized). However, in iTunes, the album shows I must purchase it again, as if I never purchased it.

I purchased an album. I cannot play a song on the album. When I try to play the song, an iTunes window pops up asking me to authorize the computer. The computer is, however, authorized, since all the other songs on the album and all my other purchased music plays. I don't want to delete the file on my computer because in iTunes, the album shows prices next to each song and for the whole album, as if I hadn't purchased it. I want my album back!