Working on a NCP500 w/ v6 software which has SVM. I have one extension that has its own line, and would like all unanswered calls to go to the mailbox of said extension. I know the mailbox is working, as I can log in, record and playback the greeting etc. However, I cannot get unanswered calls to roll into the mailbox. I have the extension set to forward busy/unanswered calls to the SVM pilot number, 591 in this case, but calls just ring and ring and ring. What am I missing?