Working on a BCM450 R6. It has 20 IP sets on it and trying to replace 20 more digital with ip. Keycode applied ok. I changed the extension number on a digital set. When I try to add this set as an IP, I get "invalid DN". Ip set range is set to 100 sets, including the one I am trying to use. I have tried this with 3 other sets, all with the same result. Any thoughts as to why this is happening.