Set relo is actually a great feature but it is kind of dangerous. If set relo is left on and two or more people try to plug phones in at the same time, it can and usually will crash the entire system! ALWAYS leave it turned off until you are ready to move phones one at a time. Never plug another phone in until you can actually make calls out on the phone you just moved! My guess is that set relocation was turned off, (as it should be) or you are plugging into a jack that is not cross connected. Did the phone do anything when you plugged it in? It should start flashing almost immediately if the jack is hot.
Phonehed in Dallas