Geforce 8800GT dualview problem

I'm having problems connecting my lcd tv to the computer. I have a 8800gt and the latest drivers etc and when I hook them together with an hdmi to dvi cable, I am only getting the following options in the 'Set up multiple displays' section of the NVIDIA control panel:

Only use one display (Single)
The same on both displays (Clone)

I am also supposed to see an option there for Dualview am I not? I don't know why that option is not showing.

Any idea why this is so? I just updated my drivers and have been looking around on google but no luck yet. Any help to solve this issue would be greatly appreciated.