I have 3 lighted signs in my front office working with a PD-6WCL. The signs have led strip lighting with a 24v power supply inside. I am not trying to dim them, just want to run them full power. When I disconnect 2 of them , one of them will work fine. When I connect all 3 together , all 3 flicker. I have tried a Lutron LUT-MLC without any luck. Any suggestions?Also can a PD-6ANS be used only with 2 power wires?