Hello I am trying to connect a new toshiba dvr630 vrc/dvd combo to an already exisitng motorola dct3416 I dvr and a sony blue ray and am having trouble doing so. I have connected the new combo to the tv with a hdmi cable and connected the dvr to the new combo using rca cables red, white and yellow. The problem I am having is when trying to record from dvr to new dvd nothing is being recorded. The combo shows recording however nothing is being recorded. Can you help me understand what i need to do, please?