Encouragement Keep Going

I seem to be having trouble with my new Muse that I loaded with version 1.3.

Both the Sustain Pedal and the Expression Pedal are connected, and the Expression assignable controller is functioning well with the expression pedal. However, the moment I press down on the sustain pedal, the expression light turns off, and the expression pedal stops responding. Just why?


Does this always have to be this way, or is there a way to make them distinct? This isn’t how it ought to function, it seems. because those are two distinct tasks.