Owch thats an odd one sounds like its time to call the vendors and see if you can get it figured out.
Write down each problem how you tested it, if your completely having problems with MIDI on the Triton call Korg. If its connecting to other modules and keybaords call CuBase.
You may have to call both of them, many times one vendor points you towards another, see if they have online support and drop them a message.
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