I recently moved from California to Michigan. In California I was always able to set up speed dial numbers on the remote units by using *74 and *75. Now in my new space in Michigan, I get a verbal error message when I try to set up speed dials on the handsets. Why is this? My old manual, which I can't now locate, had instructions for using *74 and *75. The manual I just viewed does not. Please help! I have many speed dials I want to use from the remote handsets.