I just upgraded to GarageBand 2 and all of the sudden, GarageBand makes no sounds at all. If I export a song, that has sound, but I cannot get ANY SOUND whatsoever to come out of GarageBand 2. I have every volume adjuster I could find on max including my computer, and all tracks enabled. Everything from playing the song in GarageBand to hitting the onscreen keyboard, it just makes no sound at all. Does anyone know what could be wrong here?