purchased music

I recently purchased an album from itunes. some of the songs on the album will not play. Ever time I try to play certain songs on this album a message comes up saying I need to authorize this computer to play this song. So I follow the prompts and authorize the computer. But nothing changes. The same message keeps coming up every time I try to play these songs. So, I repeat the process of authorizing the computer. I can play the majority of the songs on this purchase album except for 3 songs. I paid for this entire album. Only seems fair I should be able to listen to this entire album. Anyone have any ideas on what I can do to correct tis issue?