First post here, so bear with me. I have an OmniPro II installed about 2006, firmware 2.11. Typical alarm, temp, lights, audio setup. There are about 75 UPB switches and lamp modules installed, and I've managed to learn the basics of programming buttons, scenes, event-based rules, etc. using PC Access v3.17x. All works fine, and does what it needs to do. There are several light switches that need replacing, however, and I can't figure out how to get them programmed to work as a "replacement" for the one there before. Each of the switches has a "unit" number and name that I can see in the PC Access setup area for UPB. I have replaced one of the switches with a HAI UPB dimmer switch, and it works fine manually. When I put the switch into "setup" mode and try to configure it from a console, the system starts to find the device, then returns a "unknown device" message. Similarly, if I try to connect to a working switch from the console, the same error occurs. I've read a ton of posts trying to figure out how to replace a switch, and looked through the OmniPro manual and the HAI UPB switch documentation, but no luck. So, how do I replace a previously working switch with a new one, get it coded into the controller, and preserve the existing programming? Thanks in advance.