AttributeType not found: "gidNumber" errormessage - Openldap

["Andreas Bauer" <andreas_bauer@arcor.de>]

Hello!
I'm installing an Openldapserver with samba. All new versions.
The smb.conf is right, I can post it too, when it must be.

So, I'm geting errormessage, when I start sldap on commandoline:
amd:/usr/lib/openldap # /usr/lib/openldap/slapd
errormessage:
/etc/openldap/schema/samba.schema: line 432: AttributeType not found:
"gidNumber"

I think, I must create a new group with a gid. But is the groupname
sambaGroupMapping?

my samba.schema-line 432:(MUST...):
##
## Group mapping info
##
objectclass ( 1.3.6.1.4.1.7165.2.2.4 NAME 'sambaGroupMapping' SUP top
AUXILIARY
           DESC 'Samba Group Mapping'
           MUST ( gidNumber $ sambaSID $ sambaGroupType )
           MAY  ( displayName $ description $ sambaSIDList ))

##
## Trust password for trust relationships (any kind)


my slapd.conf:
# See slapd.conf(5) for details on configuration options.
# This file should NOT be world readable.
#
include         /etc/openldap/schema/core.schema
include         /etc/openldap/schema/cosine.schema
include         /etc/openldap/schema/yast.schema
include         /etc/openldap/schema/inetorgperson.schema
include         /etc/openldap/schema/samba.schema
include         /etc/openldap/schema/rfc2307bis.schema
include         /etc/openldap/schema/yast.schema

# Do not enable referrals until AFTER you have a working directory
# service AND an understanding of referrals.
#referral        <ldap://root.openldap.org> ldap://root.openldap.org

pidfile         /var/run/slapd/slapd.pid
argsfile        /var/run/slapd/slapd.args

# Load dynamic backend modules:
# modulepath    /usr/lib/openldap/modules
# moduleload    back_ldap.la
# moduleload    back_meta.la
# moduleload    back_monitor.la
# moduleload    back_perl.la
# Sample security restrictions
#       Require integrity protection (prevent hijacking)
# Define global ACLs to disable default read access.
#access to dn.base=""
#        by * read

#access to dn.base="cn=Subschema"
#        by * read

#access to attr=userPassword,lmPassword,ntPassword,userPKCS12
#       by self write
#       by * auth

#access to attr=shadowLastChange
#        by self write
#        by * read

#access to *
#        by * read

#######################################################################
# BDB database definitions
#######################################################################

database        ldbm
suffix          "dc=samba,dc=junits"
rootdn          "cn=admin,dc=samba,dc=junits"
rootpw          secret
directory       /var/lib/ldap
cachesize       40000
dbcache         60000000
index           cn,sn,uid,displayName           pres,sub,eq
index           uidNumber,gidNumber             eq
index           sambaSID                        eq
index           sambaPrimaryGroupSID            eq
index           sambaDomainName                 eq
index           objectClass                     pres,eq
index           rid,primaryGroupID              eq
index           default                         sub

access  to dn="."dc=samba,dc=junits"
           by self                 write
           by *                    read


Best regards and many thanks
Andreas