I'm trying to enable Kerberos authentication through Advanced Security
Option for Oracle9i DB (9.2.0.4). Server and client are on the same
Windows 2000 computer. The system's server is also a Windows 2000 with
Active Directory.

I followed all the instructions in the Oracle Advanced Security
Administrator's Guide to configure my system correctly. But when I try
to connect to the DB via SQLPLUS on the command line I get the error
ORA-12641: TNS:authentication service failed to initialize.

My sqlnet.ora looks like this:

SQLNET.AUTHENTICATION_KERBEROS5_SERVICE = oemrep
SQLNET.KERBEROS5_CONF = c:\krb5\krb5.conf
SQLNET.KERBEROS5_REALMS = c:\krb5\krb5.realms
NAMES.DEFAULT_DOMAIN = mycompany.local
SQLNET.AUTHENTICATION_REQUIRED = TRUE
SQLNET.AUTHENTICATION_SERVICES= (BEQ, TCPS, KERBEROS5)
SQLNET.KERBEROS5_CC_NAME = c:\krb5\krbcache
SQLNET.KERBEROS5_KEYTAB = c:\krb5\v5srvtab
SQLNET.EXPIRE_TIME = 15
NAMES.DIRECTORY_PATH= (TNSNAMES)
SQLNET.KERBEROS5_CONF_MIT = TRUE

Any ideas what the problem might be?
What have I got to do to make my system use Kerberos?

All suggestions welcomed!