I can call from my computer with the X-Lite softphone, however, when I try to call the GVoice # from my cell, it tells me that “the number you have dialed is not in service. Please check the number and try again”. Do I need to check the box in GVoice that says to use that number as the home number? When I do this it rings the phone at home for about a half a ring and then tells me that the number is invalid. What do I need to do to fix this?