MIDI Commands

I have Aa Friedman Twin Sister 2 Channel amp. Trying to configure channel switching using a Suhr Micro Midi control.
My understanding is that MIDI external commands will not function in pre set mode.
I am trying to reconfigure in scene mode but the Suhr box is not responding. Have the cortex set to channel 1 PC at 1 and have tried at #2 . Does anyone have experience configuring this or something similar. Just trying to switch channels on the amp for different pre=sets or scenes.