Problems with better computer

Hi ,
I have the game Napoleon :total war and I played a lot and it worked untill I changed to a better computer. The Informatic told me ,the game doesn't work because of the 64 Bits that my computer has and the game doesn't work with it. I have spent a lot of time looking in Internet for actualitations but I don't find anything and I think you should work and repare Napoleon :total war.
Thanks ,
Monmoll

64bit has nothing to do with it.

Post your dxdiag.