If you have two or more video cards, you need to disable or remove one (or more) of them so only one GPU is available when you start DW.
But, if this is not the cause, please try uninstall the game, then re-install it, and use the EU 1.04 patch here
If the patch finished successfully, please upload the dw.exe or ds9dw.exe in your game folder to mediafire or rapidshare. I'll check it out.
If you know how to use hex editors, you may also try modify it according to Komat's page:
(It's not too hard actually, only one digit need to be modified.)