Vista - HDMI Problems

Hi,

I am currently trying to connect my Toshiba laptop which has a hdmi output to my Phillips TV.

The first time i plugged it in the TV read it and but it had bad resolution so i then changed the settings to extend the desktop and it was fine i then tried to change it back to cloned but the TV said it was "unsupported video format" so i turned my laptop and my TV off and the next day had the same problem and then i tried to extend the desktop and it came up with the same error message which is "unsupported video format" is there any way i can fix the problem?

My Graphics Card is the ATI Mobility Radeon HD 2600 and My TV is a Phillips
42PFL9532/98 and I am using ATI Catalyst Control Center.

By the way I am using a hdmi cable from my laptop's hdmi output to my TV's input.

It will be great if you can reply and help me out with my problem.

Cheers