I'm not quite sure I'm following you, so let's clarify a few things.

1. What source are you trying to record on your DVR?
2. You say you have a "3D TV tuner box", but are you referring to the Mitsubishi 3D adapter for a Mits DLP TV? If not, what is this device you're speaking of?
3. Are you saying you have a separate DVR and separate cable box?

DaveH said:

Matt Whitlock said: I'm not quite sure I'm following you, so let's clarify a few things. 1. What source are you trying to record on your DVR? 2. You say you have a "3D TV tuner box", but are you referring to the Mitsubishi 3D adapter for a Mits DLP TV? If not, what is this device you're speaking of? 3. Are you saying you have a separate DVR and separate cable box?

So far I have not been able to record a 3D program, that is what I would like to accomplish!  The 3D only comes out in HDMI, I think I bought a HDMI Cablebox to record, but I need it to go out to the TV in HDMI as well, that is the way 3D works....... I have an LG 47LX9500 Television, and a Comcast HD Cable Box, yes seperate Cable Box to DVR!  I dont know the rest?

Without knowing what you purchased as a DVR, it will be hard to give you any idea what may or may not be working. That said, I know of no standalone DVR with HDMI input capablility to capture. In fact, HDMI is wrapped in protection technologies to prevent capture and recording, which means I don't believe your approach will work.

My advice to you is to forego the separate DVR/Cable box approach, and swap out your Comcast HD Cable Box for their HD-DVR.

Alternatively, you could get a TiVo Premiere and Cable Card. You wouldn't capture your Cable Box output in that case. The TiVo, equipped with a Cable Card from your cable provider, can record and playback any (non on-demand) 3D content you subscribe to.