One other thing you might check is what device is being used for audio playback. If you have more than one option you might select a different one and see if that works.
I know that sometimes when you install something like Replay Music or Replay Radio that the playback device gets changed to something those two programs use to record audio. It happened to me and I had to change the playback device to my default for YME or WMP to work.
So I take it I might not want to upgrade to the latest
tunebite until this is worked out?
Or is this not that common of a problem?