^That is what I am wondering, why would you want to downgrade to the 32 bit version?
Many people are under the assumption that if they have a problem running a 32 bit application under Vista or Win7 64 bit, they need to have the 32 bit version of Windows. If the program will not run under Win7 64 bit, odds are it won't run under Win7 32 bit either. The issue is the newer version of Windows, not whether it is 32 bit or 64 bit. If you are having problems finding a 64 bit driver for an older device you are trying to run under Win7, try the Vista 64 bit driver, it will work most of the time.