So I've just purchased a used PX-150 from someone and it works great, except for one thing. I have a Casio 3-pedal stand that I've hooked it up to. From left to right, the first two pedals work fine, but the far right sustain pedal work oppositely of the way it should. When I depress it the keys are not sustained, when I let it go all the keys sustain. I've tried everything I know to do, such as plugging it in before, or after its turned on with the pedal depressed, or not depressed. I don't know what else to do. The pedals don't have a polarity switch on them either. Whats the deal?
