My Slingbox was working fine for the first two months. Now I an having problems changing channels. When I turn it on it will go to the default channel that is set up on the cable box. When I go to change the channel if I do it through the guide it will either stay on the original channel or it will only read the first digit ( so if I click 29 it will go to 2, 39 it will go to 3).Same thing with both remotes. Any ideas?