TV to laptop

Hello, I have a Sansung 42" plasma I woul like to hookup my Tashiba laptop
the TV nas a hdmi/dvi on it to go to the Laptop. the Laptop has a VGA/RGB
on it. I have a cable with a HDMI on one end an a DVI (24+5)
on the other On the DVI end I put a DVI to VGA/RGB adapter on it .
The TV see it but it tell me "NO SIGNAL" . when i unplug it , It tell me "check
Cable"
I all so have a HDMI to VGA cable the TV Don't see this cable at all
I am runing Win 7 and I have went in to teel it that the tv is hooked up & I have all so played with the screen Size .......What do i need to do to make this work