I just got two D-R4SU's and they both respond to the remotes when I try to do things like on/off, open/close, dimmer, etc, but I can't seem to get either unit to display anything on the TV so that I can actually use the unit (programming the time, record functions, etc...). I have one of those digital antenna boxes that is plugged into the COAX in (on the D-R4SU ) and the COAX out (on the D-R4SU ) is plugged into the TV and I get the TV channels just fine so I know the D-R4SU is at least passing the anteanna signal through to the TV but as I said, I'm not getting any D-R4SU signal to the TV. What am I doing wrong?