We had to replace our IP400 DS 16 V2. Trying to intsall new one but when phones are plugged in, it reads Please Wait... forever. On the configuration before the old one was replaced, it said version 6.1 (9) but new one is showing as 4.1 (31). Does this sound like it just needs the firware updated? If so, how is that done?? I assumed it would just be updated automatically. Thanks