I am trying to get Send - Loop 4 of my Axess Electronics GRX4 to switch channels on my Egnater Rebel 30 head. I have the GRX4 set to latching, but no results. The Rebel 30 head has a stereo cable/jack system with two-button footswitch to change channels and activate the reverb circuit. I am having no luck. I really want to move over to the Rebel 30 for my next live show, as I have fallen in love with this amp, but I have to resolve this glitch. 3 Mile Stone will be opening for Kenny Wayne Sheppard Band in January, so I have a little time, but it's bugging the crap out me. So I cast my fate to the crafty and resourceful masses of TGP. School me people, what could it be????