strange log event by kdc

[Gustavo Rios]

Dear gentleman,

after setting up my kerberos server everything is working ok, but
there are some strange log events everytime i try to get a ticket:

2007-03-12T14:14:58 AS-REQ [EMAIL PROTECTED] from IPv4:10.0.0.1 for
krbtgt/[EMAIL PROTECTED]
2007-03-12T14:14:58 Using aes256-cts-hmac-sha1-96/aes256-cts-hmac-sha1-96
2007-03-12T14:14:58 Requested flags: renewable
2007-03-12T14:14:58 sending 722 bytes to IPv4:10.0.0.1
2007-03-12T14:14:59 TGS-REQ [EMAIL PROTECTED] from IPv4:10.0.0.1 for
afs/[EMAIL PROTECTED]
2007-03-12T14:14:59 Server not found in database:
afs/[EMAIL PROTECTED]: No such entry in the database
2007-03-12T14:14:59 sending 118 bytes to IPv4:10.0.0.1
2007-03-12T14:14:59 TGS-REQ [EMAIL PROTECTED] from IPv4:10.0.0.1 for
krbtgt/[EMAIL PROTECTED]
2007-03-12T14:14:59 Server not found in database:
krbtgt/[EMAIL PROTECTED]: No such entry in the database
2007-03-12T14:14:59 sending 121 bytes to IPv4:10.0.0.1
2007-03-12T14:14:59 TGS-REQ [EMAIL PROTECTED] from IPv4:10.0.0.1 for
krbtgt/[EMAIL PROTECTED]
2007-03-12T14:14:59 Server not found in database:
krbtgt/[EMAIL PROTECTED]: No such entry in the database
2007-03-12T14:14:59 sending 121 bytes to IPv4:10.0.0.1
2007-03-12T14:14:59 TGS-REQ [EMAIL PROTECTED] from IPv4:10.0.0.1 for
krbtgt/[EMAIL PROTECTED]
2007-03-12T14:14:59 Server not found in database:
krbtgt/[EMAIL PROTECTED]: No such entry in the database
2007-03-12T14:14:59 sending 125 bytes to IPv4:10.0.0.1
2007-03-12T14:14:59 TGS-REQ [EMAIL PROTECTED] from IPv4:10.0.0.1 for
krbtgt/[EMAIL PROTECTED]
2007-03-12T14:14:59 Server not found in database:
krbtgt/[EMAIL PROTECTED]: No such entry in the database
2007-03-12T14:14:59 sending 125 bytes to IPv4:10.0.0.1


Why does heimdal kdc try to obtain a krbtgt for other kdc realms than SSO.NET?

Thanks in advance.