Direct3ddevice9:: present failed: driver internal error?????

hi guys
can some one help me please

i installed cod 5 this last week
i also installed all the patches

The game runs fine in multiplayer only with the standard maps!!!
when i try to load a map from 1 of the 3 mappacks it loads a while and than
the game crashed with this Direct3ddevice9:: present failed: driver internal error

i only have that with maps from the map pack
i updated my directx and video driver and the error is still there

the grapighcard i use is a
ATI radeon
512 mb
x1650 pro

does any one knows a solution ???
PLEASE CAN SOME ONE HELP!!!