A smartcard application cannot read information from some smartcards on a computer that is running Windows Vista or Windows Server 2008
On a computer that is running Windows Vista or Windows Server 2008, you use an application together with a smartcard reader to read information from smartcards. However, the application cannot retrieve information from the smartcards. When this issue occurs, the application does not work correctly. Additionally, the application may stop responding. For example, you may encounter this issue when you use ActivClient.
For more information on this issue, including potential causes, workarounds, and resolutions, see: Microsoft KB Article KB982334.