One song in album will not play

My daughter recently purchased an album ("Run (Deluxe Edition)" by Sanctus Real) on our account, but we have been unable to get one song (entitled "Promises") from that album to play. All other songs work properly.

Specifically, when I attempt to launch the song, an iTunes account dialog box pops up asking for my account ID and password. The dialogue box is titled, "Authorize This Computer." It then states: "This computer is not authorized to play "Promises". Would you like to authorize it?" I type in my Apple ID and password, and the response dialogue box states: "This computer is already authorized." However, it still will not play. It takes me through the exact same loop of asking me to authorize the computer by logging into my iTunes account. Again, all of the other songs play perfectly fine without asking for me to log in. It only happens with this one song.

Any clues why this is happening? Does Apple offer any simple method to re-download the album we purchased from their iTunes store?

I appreciate any help you can offer. Thank you.