Hmm. Thinking about it, I did run into another issue - actually unrelated to the actual sending/receiving of MIDI messages - which hindered me extremely and produced a similar thing. Probably I'll need you to download a custom MCT to see if it fixes the issue. Unfortunately I don't have my MD here with me to test it out, but should have access on Tuesday. Give me a couple days to figure it out and I'll send you a PM or something