I have one expression pedal. I plug into my Pitchfactor and control my Modfactor via MIDI. Everything works well except on QWah patches I cannot get a wah sound when I set the source knob to EXP PDL. The Modfactor display goes from 0 to 99 but there is no modulation. If I plug directly into the Modfactor it works fine. I know I can just set it up the other way (contol Pitchfactor via MIDI which is what I did) But I am just curious why it does not work the other way. Both units have been upgraded to Beta versions, just wondering if there could be a bug.