unreal tournament problem

[UTplayer]

i recently got UT, but when i try to play i get the blank screen and my monitor says "out of scan range" that happens when i used d3d, same with software. it works for opengl but its horrible slow. can anyone help?

system:
diamond v550 agp
pentium III 500
latest detonator drivers

[ghostgeek]

TnT1's have graphical glitches in this game.Also try adjusting the refresh rate on the adapter tab of advanced settings.And bring the game down to 800x600 or so.