After 1366x768 resolution - Black screen

Hi,
I have a Mac mini (Early 2006) DualCore with a Sony Bravia KDL-40V2000. I have connected both electronic devices with a Belkin cable (HDMI to DVI-D)
I have some problems to choose the screen resolution. The best TV Sony Bravia resolution is 1366x768, but the Mac Mini resolution more near is 1280x720.
I have configured through DisplayConfigX 1366x768 resolution and then I have to reboot Mac mini.
But after the Mac mini reboot, I can't see anything on Sony Bravia Display. All the screen is black.
Only workaround that I have tested is connect a VGA display and try to change the display configuration, but Sony Bravia display configuration doesn't appear. Only VGA display connected is available to change config.
How can I do to resolve this big deal? Thank you very much!!
How can I do to configure the best resolution as possible to enjoy that?
Thanks in advance!!!

When I started setting up my Intel Mini with my TV, I also had trouble getting it to work at 1366x768. I tried DisplayConfigX, but found it too technical. I was able to get SwitchResX to work. I don't have the same TV as you, nor am I using HDMI (mine is DVI), but perhaps you could try SwitchResX to get you working.
From a previous post, here is what I did:
I created a custom resolution. On the settings for that, I chose "Custom" (rather than scaled), I clicked on the "Use simplified settings: GTF". I used 1366 (horizontal) and 768 (vertical) for the "Active" setting, and 60 Hz for the Vertical Scan rate. All the rest of the fields adjusted themselves.
As also stipulated before, I don't really know what most of these settings mean, just that they work.

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