Reply to Kontrol Z2 - Add Mappings - FX 3/4

Does anyone know how to add mappings to the Z2? I want to create on/off for FX banks 3 and 4 using shift+FX1 or FX2, but I can't seem to get that combination of inputs to register save; only "shift" or FX 1 or FX2 is recognized. Is there a MIDI mode that needs to be enabled?