Are you connecting this switch to H9 with a TRS cable? Do you have the Exp Pdl input configured for an aux switch? What do you have the switched mapped to? Make sure it’s not accidentally double mapped to anything else.
Switch comes with a cable ( i believe TRS ) and i am using Exp Pdl input and it has only 3 options in the H9 Exp pedal menu and i have tried all of them didnt work. Do i need to make any other changes , setup to make it work ?