I just installed a new pedal assembly for my Casio Celviano AP-620 Digital Piano and set the acoustic resonance setting to sustain notes to "On." However, when I play either the Grand Piano or Modern Piano setting, my notes are not sustained. Please help me figure out why my new pedals are not working. I believe that the new pedal is good and not defective. Thank you in advance for your help. By the way, does anyone know of a Casio digital piano repair person in San Francisco? I will pay for your expert service.