hi, i had the same problem with my COD 4 game,
i found that #9006 is a video problem,
make sure your p/c display settings are exactly the same as your game display settings.
after adjusting mine back to 1024X786 70Hz Refresh then checking that the game display settings are the same, it all went away.
hope that helps some.
P.S after some problems with vista of my own, i found that tweeking back to 60Hz refresh rates helped heaps. try that too.
[DuCE]DingO aka BeeRXXXX