I have a trueCall blocker unit and it has been doing it's job perfectly for years. Until yesterday my home phone line was BT. It has changed today to Virgin and I can't get the call blocker to work with my phone. The phone is supposed to ring when a know and saved phone number calls but my phone is silent. Then my blocker machine flashes to tell me a starred caller left a message. I have unplugged one of the connecting lines and the phone did ring....does this mean that I can't use the call blocker machine with the virgin line....i'd much rather override the virgin phone features ie call ID etc and use my blocker machine. Can this be done?