How to restrict Disabled users from login

Hi,

We are using PGP Universal server 3.2 and configured WDE .

Multiple users login to the same system on shift basis.

In PGP Desktop we have created users who login to the respective systems.

Issue:

Even after disabling the user in Active Directory, if we try to login in to the system with the disabled username from PGP BootGuard , the system is booting and user is able to login.

Only after logoff, next time it is not allowing to login.

 Please let me know if we can clear cache for login or any other method to avoid logins from disabled users.

Thanks in advance.