Have a look on this document as it need troubleshooting why it not working.
-as the support guru to have a look.
-if you are end client and your passcode is not working. it means your AD credentials are correct. as if credentials were wrong it wont prompt for passcode. could be issue between the firewall and WINAUTH.
but if you are a network/security person have a look on the document mentioned above.
please do not forget to rate.
