New computer, won't sync some songs

[bfcoughlin]

I have a new computer. Launched iTunes, authorized the computer. Thirteen of my purchased songs won't load onto the nano because it says the computer is not authorized to play them. I played each of the songs in iTunes and authorized each individually when asked. They still won't sync--I get the same message. This worked the last time (after a hard drive crash), but it isn't working now. Any advice?