unable to switch primary monitor

[Guest]

I was trying to set my TV as primary monitor, but the tick-box for doing so
was
inaccessible. Does anybody know how to make this tick-box accessible?
Running Windows XP Professional with service pack 2 on a Compaq Laptop
(N800v).
Regards
Fred

 

[Cari \(MS-MVP\)]

Ensure you have the latest drivers for your graphics card.

 

[Guest]

I do. I still don't get that tick-box "tickable".
Any other suggestions anyone?
F