Digital Signing in Vista Platform

I'm develop a smart card programming. I want to do digital signing.. The
problem is.. My program get stuck when it want to do the signing..

My program supposely to read the data from the smart card.. Then it will put
it in the Vista registry.. The problem is.. My program cannot put the data
from the smart card into teh registry.. So, when the program to do the
signing, cannot read the certificate, it will show an error.

My question is..

Is there any setting need to be done in order for me to the data in the
registry. Actually, I can straightly do the setting in registry via the
Install Shield program. But, for the certificate information, we cannot do
that because the certificate information is by card.