Question : Problem: No sound in iTunes

All of a sudden, I get no sound from iTunes.  When I click on a song, it comes up in the top progess window, but does not start to play.  Videos play, but with no sound.  Every other program on the computer produces sound just fine.  

Has anyone seen this?

Answer : Problem: No sound in iTunes

I ended up uninstalling the sound card and reinstalling it.  All works perfectly now.