Antigen Administrator will not start after upgrade to Windows 2003 SP1

Hi!

I had everything working just fine before upgrading W2K3 to SP1. My MS Antigen SMTP GW v9.0 still works, but the administration console gives to following message:

ERROR: Unable to connect to service: “advice returned: Access is denied” when the console tries to connect to my server. As far as I can see, all services are running.

Mail transport is working just fine.