Server not found in database

[Torsten Ruest <truest@gmx.de>]

Hi,
I want to set up heimdal, but I fail due some problems:
It says:
telnet sun1642.b1b.lab.isk.kth.se
Trying 172.27.251.11...
Connected to sun1642.b1b.lab.isk.kth.se.
Escape character is '^]'.
Waiting for encryption to be negotiated...
[ Trying mutual KERBEROS5 
(host/sun1642.b1b.lab.isk.kth.se@SUN1642.B1B.LAB.ISK.KTH.SE)... ]
Kerberos V5: mk_req failed (Server not found in Kerberos database)
[ Trying KERBEROS5 
(host/sun1642.b1b.lab.isk.kth.se@SUN1642.B1B.LAB.ISK.KTH.SE)... ]
Kerberos V5: mk_req failed (Server not found in Kerberos database)

Authentication negotation has failed,
which is required for encryption.
my krb.conf file looks like this:
more /etc/krb5.conf
[libdefaults]
        default_realm = B1B.LAB.ISK.KTH.SE

[realms]
        B1B.LAB.ISK.KTH.SE = {
                kdc = 172.27.251.11
        }

[domain_realm]
        .b1b.lab.isk.kth.se = B1B.LAB.ISK.KTH.SE

I created the krb.keytab file, and added some user/admin and user. Here 
is an extract from my kdc.log file

2005-08-18T13:19:46 TGS-REQ ruest@B1B.LAB.ISK.KTH.SE from 
IPv4:130.237.209.71 fo
r krbtgt/SUN1642.B1B.LAB.ISK.KTH.SE@B1B.LAB.ISK.KTH.SE
2005-08-18T13:19:46 Server not found in database: 
krbtgt/SUN1642.B1B.LAB.ISK.KTH
.SE@B1B.LAB.ISK.KTH.SE: No such entry in the database
2005-08-18T13:19:46 TGS-REQ ruest@B1B.LAB.ISK.KTH.SE from 
IPv4:130.237.209.71 fo
r krbtgt/SUN1642.B1B.LAB.ISK.KTH.SE@B1B.LAB.ISK.KTH.SE
2005-08-18T13:19:46 Server not found in database: 
krbtgt/SUN1642.B1B.LAB.ISK.KTH
.SE@B1B.LAB.ISK.KTH.SE: No such entry in the database

Any help is appreciated.

Best wishes,

Torsten