When I import a MIDI file, I often want to add an SI Drum Kit track and assign the drum track on the MIDI file to go through the SI Drum Kit. That gives me better options for drum sounds etc. I now find that on some files, as soon as I assign the original drum track to go through the SI Dum Kit, there is no drum sound at all and the SI Drum Kit track itself ( when viewed in and the appropriate keys are hit in Piano Roll view that would make say the kick drum sound) is silent, Reassigning he