I can't play campaign [Crash]

Hi all!
I've, in order:
-Bought Medieval II TW Pack on Steam (game correctly updated at the last patch)
-Downloaded CoW 1.5
-Installed Cow 1.5+english "data" translate

After I've replace the "American" campaign with the CoW (Bellum Crucis mod let's start using this method) the mod correctly started. But, just clicked the "Storm of Chaos" botton the game crash at the desktop.

I've Win 7 64 bit, HD Radeon 6950, 4Gb Ram and Q6660 processor.
So my pc is full capable for the game.

How i can play the campaign and resolve this problems?

Sorry for my, perhaps, incorrectly english.

Thanks

Info for All Windows 7 users!
Before posting: How to fix stability, Vista, Win 7 issues (incl. fatal graphics errors) and broken savegames --
HELP! The Dark Gods aren't Letting Me Play CoW 1.5!! (Installation Help thread)
And for future check sticked topics...