No Video Via HDMI With Denon Receiver

I just purchased a Denon 2307 receiver and I am attempting to use my MacBook as my DVD player. I purchased a DVI-HDMI cable and plugged my MacBook directly into the receiver. An Optoma HD70 projector is connected to the HDMI out connection on the receiver. However, I get no video and the receiver just clicks while it searches for something connected to the HDMI2 connection. Audio works via an optical cable, however.

If I connect my MacBook directly to the projector I get video. Either way, the MacBook System Preferences recognizes a 2nd monitor, either DENON-AV or OPTOMAHD70. So, I know it is not the cable. I also know it is not the HDMI2 connection because I tried HDMI1 as well. Normally, I have an HD TiVo connected to HDMI1.

Searching the forums and performing random Google searches has yielded nothing except one vaugue reference to a lack of HDCP on the MacBook. I currently don't have any other adpaters/cables to test this theory, i.e. vga-component... which I am unsure would work anyway.

On the AVSForums, someone with an intel Mac mini and a Denon 2807 receiver got them to work together. Yes, they are different models, but I mention it because they are of the same most recent generation.

Will this setup ever work?

Thanks in advance for any help.