I have a DS64 installed and it was programmed and operated fine. I hooked another DS64 to the LocoNet and was prepared to hook-up additional switches to the next DS64. But before I started I checked the switches programmed on the original unit and nothing! No response. I tried resetting the addresses and do not get the "heartbeat" after #4 as the indication the programming went through, and after doing all four the light still blinks like nothing has been programmed? I tried with the additional DS64 disconnected from the loco net and have tried re-cycling the track power, too. No success. The older decoder that has switches works fine and track power is fine? I have three DS64's that I want to utilize. I have a Digitrax Super Chief system and now a mystery.