Server Admin authentication errors

When I try to connect to my server with Server Admin, it gives me an error:
"A server or service is no longer accepting requests.
Try to disconnect from mydomain.com and then reconnect, or contact your network administrator."

In the system.log I get this:
"Feb 14 17:34:00 localhost /Applications/Server/Server Admin.app/Contents/MacOS/Server Admin: HTTP_REQUEST_FAILED: https://mydomain.com:311/commands/servermgr_info: authorization required"

Before having this problem I had to repair the cyrus db using this method:
http://docs.info.apple.com/article.html?artnum=107996
because there were these errors in system.log
"Feb 14 13:26:43 servermail mbpath[14774]: DBERROR db4: fatal region error detected; run recovery
Feb 14 13:26:43 servermail mbpath[14774]: DBERROR: dbenv->open ‘/var/imap/db’ failed: DB_RUNRECOVERY: Fatal error, run database recovery"

I used Mac OS X 10.3.7 but due to the Server Admin problem I have updated to 10.3.8.

Anybody else seen this?
Thanks