Service Desk, Pass Thru Authentication and Smart Card Logon

Service Desk, Pass Thru Authentication and Smart Card Logon

I'm trying to enable Pass-Thru Authentication on my Service Desk. My organization uses smart cards to logon to the network. My pass thru is not working and I believe it's because of the smart cards. Can anyone help me get this working, or is smart card logons and pass thru authentication not compatible right now?

John 8)