Urgent help required just so i can finish cool addon

[lawrie5]

Cannot Create 3d Device:
Adapter -1() Fullscreen
Resolution 800x600, format X8R8G8B8/D16, refresh 0hz
Error D3DERR_INVALIDCALL

This is what appears in a mean wee grey box when  i load bulldozer from oxy, it was an error i remember someone clever telling me how to get around but have now forgotten aieee! So please can someone tell me how to get round this?

[Morpheous]

Copy your Flashpoint.cfg file from your OFP main folder to the buldozers folder and replace it with the new one that should do the trick