Yes, sorry--I meant to report, but of course, once the problem was gone, poof, slipped my mind. YES, it did work. Apparently that transmitter was defective. When I have time, I will try activating it again, this time as a different zone, to make sure. And by the way, removing and replacing that transmitter seems to have solved another problem: many times when leaving the house and activating the alarm, I'd get a constant chime and the alarm wouldn't activate. I'd have to keep trying over and over. That problem, too, seems to have been resolved. So I'm thinking that that transmitter was sending out a partially corrupted code--if that's possible.