XP32 and Vista64

I have both systems: XP 32 and Vista 64 bits

The Vista 64 bits seems to be faster and more stable than 32 bits system

However, each time I run draft angle analysis, the 64 bits  crashes most of the time. There is somehing wrong with the system calculations which I cannot understand. Anyone here has experienced about this problem? How to improve the system?

Thanks in advance

SolidworksAdministration