Problem trying to connect mini-dp dvi to HDTV

Hi, i just came home all happy from buying a mini displayport to dvi, had all the cables set but it seems its not working... I dont know if i have to do something but as of now can´t see anything in the tv.
I´m using the mini displayport to dvi and a cable that is dvi-d single link to hdmi.
Might the cable be the problem? do i have to press a button in the mac? i´m totally lost here.
Thanks!

I know certain devices require an HDMI connection to work. Part of the implementation of HDMI was to try and curtail pirating by digital copying, so many devices look for a "handshake" in order to function.
I have personally just purchased a new MBP, so I don't have personal experience with what you are trying to do yet, but I did get a Mini Displayport to DVI adapter and we have a DVI to HDMI cable at our church. If I have time I'll try it out to see if it works or not and let you know.
I do know that my Mini Displayport to HDMI adapter I just received this afternoon from monoprice.com DOES work on my Panasonic plasma TV. For $10 it might be worth getting instead of wasting time troubleshooting what you have.

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