Using HX Effects to change Fryette PS-100 channels?

[ledvedder5150]

I'm trying to use my HX Effects to change my Fryette PS-100's channels. I'm sending external amp commands (ring, tip) the same way I use it to change channels on my different amps, but the PS-100 won't switch between channels. I'm using a TRS cable from the HXFX ext output to the footswitch jack on the PS-100.

[rd2rk]

Is the jack configured properly in Global Settings>Preferences?

 

1
Pedal 1 Jack
Determines whether the rear panel PEDAL/EXT AMP 1 jack acts as an additional expression pedal input (EXP 1) or as a dual amp control output for switching channels on external guitar amplifiers (EXT AMP 1 tip and/or sleeve).
2
Pedal 2 Jack
Determines whether the rear panel PEDAL/EXT AMP 2 jack acts as an additional expression pedal input (EXP 2) or as a dual amp control output for switching channels on external guitar amplifiers (EXT AMP 2 tip and/or sleeve).