There is no server available at the address you entered, codes: 25294, 9848

Question

About a month ago I rebooted the server and after that Server Admin hasn't worked. It says always: "There is no Server available at the address you entered".
In /var/log/system.log:
Jul 22 11:58:51 mail servermgrd[14205]: SecIdentitySearchCopyNext returned -25294.
Jul 22 11:58:51 mail servermgrd[14205]: Got error -9848 for SSLHandshake
Jul 22 11:58:51 mail servermgrd[14205]: Exception in threadListen: Socket: Connect failed
From http://developer.apple.com/documentation/Security/Reference/certifkeytrustservic es/Reference/reference.html:
errSecNoSuchKeychain –25294 The keychain does not exist.
From http://developer.apple.com/documentation/security/Reference/secureTransportRef/R eference/reference.html:
errSSLBadConfiguration –9848 A configuration error occurred.
I have also bootable backup on another disk in which Server Admin is working. I have compared files from /etc, /Library/Preference and /var/servermgrd without finding really relevant differences. Are there other places I should seek?
On some point I have changed host name. Could that cause certificate error in this case? I have checked with "sudo changeip -checkhostname" that names matches.
I have tried making servermgrd to use regular connection instead of SSL by editing /Library/Preferences/com.apple.servermgrd.plist. After changing settings, I have killed or unloaded/loaded servermgrd and tested with lsof that proper port is working. But I guess Server Admin doesn't even try to connect to port 687. Is it possible to force Server Admin to connect port 687. E.g. writing "localhost:687" as address didn't worked.
I have tried creating servermgrd.conf, ssl.crt/ and ssl.key/ to /etc/servermgrd/ even thought they weren't there originally.
I have tried connecting with many different IPs and DNS names and done as instructed here http://support.apple.com/kb/TS2757. According lsof, ports 678 and 660 are not in use normally.
I have tried moving/trashing /var/servermgrd/ and ~/Library/Preferences/com.apple.ServerAdmin.plist.
I have tried stopping ipfilter.
Is it possible find out that which certificate servermgrd is trying to use?
What else I could try? The server is currently running email and web services among other things with many users, so therefore I can't try too rough methods.

Answer 1

Little progress maybe...
I tested Server Admin of the working backup while using "sudo fs_usage -f filesys <PID>".
When I did same with the actual nonworking server I noticed this difference:
18:53:09 statfs private/var/root/Library/Keychains 0.000010 servermgrd
18:53:09 open private/var/root/Library/Keychains>>>>>>>>>> 0.000008 servermgrd
Path /var/root/Library/Keychains does not exists and backup system doesn't seems to try to use it. I suspect that "errSecNoSuchKeychain –25294 The keychain does not exist" occurs because of this.
Any hints to fix this?