thank you so much for your reply and advice,thefabe.
i really appreciate it.
compatbility thing doest work on the game
but i search for some similar thread as you said and it help me with some game.
i just change it into highest resolution(1280x800) and some of games are now back to full screen.
thanks for your advice again
still some game doest work yet.
world of warcraft 3 frozen thrown and others small game like pop cap games
they arent working as they dont have resolution of 1280x800 in game. http://img691.imageshack.us/img691/2105/85660581.png
and this is device mananger. http://img692.imageshack.us/img692/316/82215423.png
and this is resolution of my pc.it seems i cant choose ATI.Is it the problem?
when i upgrade to window7,i unstall ATI program and after upgrading i reinstall the newest one. http://img709.imageshack.us/img709/6527/82561135.png
thank you for you help and for welcoming me too