Try to add some key pressure and/or move the bender on your Super 6 after you connected it to the external synth via the MIDI ports. It might be that the running status needs to be updated. After you applied some key pressure and/or moved the bender, you should be able to fully control the external synth with your Super 6 again.
I'm using the Super 6 as a MIDI controller for another synth. The other synth doesn't respond to note messages.
