DVI display not detected problem on Radeon HD 4670

Thank you in advance for you help,
I recently purchased a HD 4670 for a HTPC build. The TV that it is connecting to is a Sony HDCP-Compliant rear-projection tv with a DVI input (no HDMI). When the DVI cable is connected the CCC does not recognize the TV is there. The computer boots fine if I use the included DVI to VGA adaptor on another monitor. I'm running 64-bit Vista SP1 with the latest ATI drivers.

Finally here is a list of things I've already tried based on my search for an answer:
Starting the computer without the VGA attached (with and without the TV already on and with both DVI ports)
Reinstalling the drivers.
Using a third party utility to force output (Ultramon).

I spent about 10 hours yesterday fighting with this computer, tech-support isn't open until monday and I'm completely out of ideas.