I just purchased the Mission Engineering expression pedal hoping to have some wah for this weekends shows. I bought a TRS cable and have tried both the output 1 & 2 on the pedal. I can get the wah working but it doesn’t want to turn off using the toe switch. I can get it to shut off when I set to heel or if I stop using it gets bypassed. Not sure what I’m doing wrong. Do I need a cable that goes into both output 1 and 2 of pedal then to the Kemper?