Thanks for the reply Noel. And thanks for the clarification that all tracks in 2007 were MIDI.
I guess I have a MIDI issue then. I can tell you that I could hear only the melody (and see the keys on the virtual keyboard being played) while other keys for other instruments were being played but I heard no sound from them. It also looked like there was more data activity watching the MIDI monitor than the sound I heard.
I will post screenshots later today.