I have a rack mounted MAG connected to the power supply and is in a midi chain before an eventide timefactor. The interconnecting cable between the TF and MAG are secured inside the rack enclosure. When I open up the back of the rack, an input midi cable to the MAG and the MKV cable are easily accessible. All works as planned. So far so good. A problem occurs when I go to play an open mic session, and the back line amp is not compatible the MKV MAG cord. I'm okay with leaving this unplugged and changing the amp channels with its own foot switch, But when the MAG is unplugged from the amp, the midi signal (which passes through the MAG) no longer controls the TF. Any ideas why this is happening, and how I can remedy it?