We need some more information before we can help you.
When\what version of the game are you trying to set up?
What are your system specs? CPU/RAM/Video card etc.
What OS and version of Direct X are you running?
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Lephturn - Chief Trainer
A member of The Flying Pigs
http://www.flyingpigs.com 
"My P-47 is a pretty good ship, she took a round coming 'cross the Channel last trip.
Just thinking 'bout my baby and lettin' her rip, always got me through so far."
- Steve Earl