HI, I am new to this forum. I am working on my VPO. I am using Hauptwerk and GrandOrgue. Hauptwerk works flawlessly but I am having trouble with GrandOrgue. The keys and pedals play fine. The problem is with the Expression shoes and Crescendo shoe. I can't get GrandOrgue to recognize them I tried all the setting that I can think of. I am using Arduino's and also a light dependent resistor. I have also tried a photometer but I can't get the expression or Crescendo to work with that either. Any help would be grateful. I tried two different sets.