I'm trying to add some DBMs to some 1416. I've got PSUs and the lights on the DBM will light up when the 1416 gets plugged in, but the phone system never sees it and I can't program it. Is there a firmware mismatch or something that I'm missing? Next week we'll be upgrading from CM6 to CM10.1 and I'm wondering if the new vendor will have to help me or if I've almost got it. I've added these before and I thought that you just plug it in, reboot the phone, and then program it up.