Clock skew too great

cartesian

UNIX HP B.11.31
Database 11.2.0.1.0
Weblogic 10.3.3.0
ADF 11.1.1.3.0

I am getting an error in the adf.log on my weblogic server when trying to access an ADF application web front end. The browser says "Unauthorised Access" and in the adf.log it says "*GSSException Failure unspecified at GSS-API level (Mechanism Level: Clock skew too great)*"

We use Kerberos to authenicate with an Active Directory server to get user details to allow access to the application.

This has been working fine up to now.

I have googled the error and it all seems to point to a time difference betewwen the AD server and the UNIX server which appeared to be the case as the difference was over 5 mins. The AD guys reset the time on their server but I am still getting the error in the adf.log.

Is there something else I need to check to get this working again?

Any help on this would be very much appreciated.