I have two series 2 units that connect over my wireless network. Problem I have is that our wireless network runs off our cell phones. So is only operational when we are here (evenings). Tivo choses to connect to the internet at random intervals. Is there any way to set that to happen during the night when we are here and our internet is on? I hate when it tries to connect during the day and we are not here and therefore our internet connection is not on.