Mackbook to HDMI tv

I have a MacBook 13" Intel. I want to connect it to a LG 50" HDMI plasma TV so as to use Front Row on the bigger screen.
i bought mini DVI to HDMI cable and HDMI cable,now its connected but the tv screen show only mackbook desktop picture n nothin on it!
how can i solve this problem?

Hi: If your external monitor is connected and you can see the Background image, open any program, iTunes, Mail, Safari. When it opens on the MacBook screen, go to the top menu bar, click and drag the menu bar to the other monitor. It should now appear on the other monitor. You can do this with any program(s).
Also see the Apple article below for more info.
http://docs.info.apple.com/article.html?path=Mac/10.6/en/8346.html
Stedman

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