i have an ati radeon 9700 pro and samsung synchmaster 955df monitor. win xp\npro sp1 all updates, latest ati drivers. the refresh rate changes by itself\nsometimes and i'd like to know why. if you go itno the display properties\nit's still the same correct setting, but the refresh is messed up. i have no\nidea what could be the issue and how to get it working again. reinstalling\nwindows and drivers does no help, the problem still happens eventually.