I'm replacing an old Partner Plus R4.0 module with a Partner II R4.1 module. I've been working through the programming but cannot figure out what I've done wrong. Incoming calls immediately go to the receptionists voicemail. When the call comes in, you hear a brief ring, then 2 lines light up. I have the extensions assigned to Hunt Group 7 and have the rings before going to VM set at 3 rings. What am I doing wrong???