Hello. I have read through the other posts in this forum on this subject, and none of the proposed solutions work for me. I have tried to use six different sustain pedals with my Prophet 12, all of which work with other keyboards, but they do not work with my Prophet. I have tried changing “normally open” to “normally closed” but that doesn’t work. Sustain Footswitch setting is set to “Sustain”. Do I just have a faulty keyboard that needs fixed? Thanks for your help.