i have found and installed some different drivers, the official drivers from sis homepage detects only 3.0 mb and doens't allow 3D acceleration (I have dicovered that this is a BIOS problem) and other driver i have downloaded from driverguide.com has the same problem of the one that i have downloaded from PCCHIPS.

And i don't have seen others with a problem like this with that game (in this and in other forums) maybe the game needs a patch or something for making it compatible with my video hardware
I've found a pacth for voodoo 2 cards but not for my video hardware.