I'm using a proven working M Audio EX-P TRS pedal into Pedal 1 in my AXE IO. I thought this was all plug and play but nothing happened for me. I chose a wah and put in in as a stompbox in AMax, right clicked on it and saw Assign Automation (greyed out) and Assign Midi. I clicked Assign Midi/Wah/Learn Wah. Got a Waiting for MIDI input message, toggled my expression pedal toe foot toe etc, nothing. I know that the expression pedal is not Midi, was just grasping at straws.
I've sent a message to support but it's Saturday and I want to play a wah!!!

Can anybody at least please point me in the general direction?