I have a Mission Exp pedal with a wah style button and 2 jacks. I simple want to control Volume in normal mode and Wah when clicked down. I am using both pedal jacks on FM3 and have dual TRS. I assign the Volume no problem. But Wah assigned to jack 2 only goes full rangle of slope from high to low when I press down....zero sweep happening. Ideas? Thanks in advance!