Kerberos Schema unknown by LDAP server

I’m trying to setup kerberos to use LDAP as backend but I’m getting
the “Kerberos Schema unknown by LDAP server”,
I have included the schema to my configuration file and restarted the
server.

slapd.conf:

include /etc/openldap/schema/core.schema
include /etc/openldap/schema/cosine.schema
include /etc/openldap/schema/inetorgperson.schema
include /etc/openldap/schema/rfc2307bis.schema
include /etc/openldap/schema/yast.schema
include /etc/openldap/schema/dnszone.schema
include /etc/openldap/schema/suse-mailserver.schema

LDAP server is up and running and I can connected to it.

Plz help me

Thanks