I am a new user to Helix and after my first patch set up everything sounds great execpt the wah! I have set up on a footswitch for on/off but the expression pedal (which I have set up for volume) only controls volume and not the wah itself. I have messed with the many settings to no avail. I need to wah to be turn on with a footswitch and once on that mode the expression pedal controls ONLY the Wah, once I click out then expression pedal goes back to a volume control. Help anyone? Thank you!!!