help me out !!!!!!!

this is the error


[1:44:35 PM] zac: Build AmericasArmy[BuildDate:2009-04-22_BuildVersion:2.8.5]

OS: Windows NT 6.1 (Build: 7601)
CPU: AuthenticAMD Unknown processor @ 3000 MHz with 4095MB RAM
Video: NVIDIA GeForce 8600 GT (7533)

Error setting display mode: CreateDevice failed (D3DERR_INVALIDCALL). Please delete your ArmyOps.ini file if this error prevents you from starting the game.

History: SetViewport <- UD3D9RenderDevice::Lock <- UViewport::Lock <- UWindowsViewport::Lock <- UGameEngine::Draw <- UWindowsViewport::Repaint <- UWindowsClient::Tick <- ClientTick <- UGameEngine::Tick <- Level Untitled <- UpdateWorld <- MainLoop

do u think he has to take dual screens off ?

Has this been tried?

Please delete your ArmyOps.ini file if this error prevents you from starting the game.