What monitor are you using?
This system should support that resolution.
Could you please provide the exact model number of your monitor?
What port are you using? DVI or VGA?
I use SAMSUNG 226 BW , the monitor its great, suports any resolution, with my old computer, I use 1280 X 800 with succes... but, wit my new computer, with integrated on board video card, does not suport 1280 x 800 ... ((((
i use DVI port, I try with VGA, but ... don't work ((
What I can do ?