please don't type in all caps.I DID WITH LINE 6 HELIX I SHOULD BE ABLE TO WITH AXE FX 11
the Helix and Axe-Fx II are different devices. what one does isn't an indicator of what another does.
the Axe-Fx II can send Program Change MIDI messages when you change presets, and the 5150 with MIDI should respond to those.
you will have better luck with this question starting your own thread, rather than posting in a thread about changing Scenes with an external switch.