weird problem with source games

[Recon55]

when i playing counterstrike or hl2 mods its somethimes gives textures problems like black tabs, weapons when i close the game my screen resolution changes into 1024 768 and i cant run any game i have to reboot my pc to play again when i play world in conflict i can play long without any problems pleas help? :cry:
specs:
Windows xp home
1024 mb ram
amd athlon 3200+
directx 9.0c
radeon x1300/1500 series
256 mb
Sry for mah bad english
ok i just find out i get it with bf2 to

[Oli]

Uhhmmm.

Update your graphics drivers

[Recon55]

i have ATI catalyst version 07.11