GTA San Andreas very strange problem!!!

[Haidorn]

Hello guys. I've bought few weeks ago the new GTA San Andreas. I've tried also the hoodlum game-fix. It gave me some graphic problems: after about 15 min of playing I saw pixels changing colors and some graphical elements in the wrong place .
Therefore I've changed the drivers of my graphic card but I've reinstalled the old ones because of some problems with Win XP.
Unfortunately, I don't know why, now I can't play any more. Starting the game it says error in

C:\.....\Temp\WER5C.tmp.dir00\appcompat.txt

AppName: gta_sa.exe AppVer: 0.0.0.0 ModName: gta_sa.exe ModVer: 0.0.0.0 Offset: 003462a7

My sistem:
OS: Windows XP Home Edition Service Pack 1
Processor: Mobile Intel Pentium 4 CPU 3.20GHz
Memory: 512MB RAM
DirectX Version: DirectX 9.0c
Graphic Card : ATI MOBILITY RADEON 9600/9700 Series with 128MB RAM


Can anyone help me???