GP 3 and GP4 abruptly don't run with GForce FX5600 and Windows XP

GP3 and GP4 do not run with GForce FX5600 at one time any longer!

So far GP4 and GP3 with and without GPxPatch ran outstanding. Abruptly both programs do not start any longer, all different run. With GP4 the following message comes:

gp4.exe - Error in application
The instruction in' 0x005078dd " refers 0xfe270082 " to memory in'. The procedure "READ" could not be accomplished on the memory.

Otherwise GP4 (and/or GP3) returns to a Blackscreen immediately again to the Windows XP-surface.

My system constellation:
Windows XP Home service luggage 2
DirectX 9.0c
1024 MT RAM/120 GB non removable disk
Nvidia GForce FX5600 diagram map with newest driver 66.93
use McAfee virus scanner and Firewall (newest in each case version)

Who can help? Thank you!

this could be a Driver Problem from your Videocard. I have a GForce FX5600 too and both Games run proper here. I usse the 45xx Drivers for my Videocard. The Drivers that you use are mainly for the new GForce 6800 Cards and nview 2