Exchange 2003 Service Pack 2

I seem to have a problem, I recently downloaded Exchange 2003 Service Pack 2. Before this everything was running fine of course. Everything is still running fine, except Outlook Web Access. Does this new service pack restrict access to OWA after installed?

I just cant seem to reach it from outside the network anymore, if im inside I can, no ports on the firewall have changed. Nothing but the SP2 installation.

Did I miss something in the configuration of this service pack? Any help is much apreciated. Thanks!