Can't get foot switch to control FX on Ui24R.
After purchasing a non latching foot switch - Boss FS-5U and plugging it in, I can't get the switch to mute FX. The mute FX box is red in settings - global page, but the switch does not mute FX as I expected. I have tried changing the polarity switch on the FS-5U but still no luck. I'm guessing its one of the other settings overriding it perhaps?? Thanks for your help.