[389-users] Object class violation !!

Hello, I was going through link: http://www.redhat.com/docs/manuals/dir-server/8.1/admin/dna.html to configure DNA_plugin. All I followed is: ldapmodify *-a* -D "cn=directory manager" -w secret -p 636 -h 389-ds dn: ou=Ranges, dc=im,dc=sap, dc=com objectclass: top objectclass: extensibleObject objectclass: organizationalUnit ou: Ranges dn: cn=Account UIDs, ou=Ranges, dc=im,dc=sap, dc=com objectclass: top objectclass: extensibleObject cn: Account UIDs Next, Enabled the DNA Plugin through Console Next, Create the new DNA Plug-in instance beneath the container entry dn: cn=Account UIDs,cn=Distributed Numeric Assignment Plugin,cn=plugins,cn=config objectClass: top objectClass: extensibleObject cn: Account UIDs dnatype: uidNumber dnafilter: (objectclass=posixAccount) dnascope: ou=People, dc=im,dc=sap,dc=com dnanextvalue: 1 dnaMaxValue: 1300 dnasharedcfgdn: cn=Account UIDs,ou=Ranges,dc=im,dc=sap,dc=com dnathreshold: 100 dnaRangeRequestTimeout: 60 dnaMagicRegen: magic Restarted the dirsrv service. Now if I try to add a user through script: ldapmodify -x -h 389-ds.sap.com -D "cn=Directory Manager" -w secret -f Users.ldif adding new entry "uid=dav,ou=People,dc=im,dc=sap,dc=com" ldapmodify: Object class violation (65) additional info: missing attribute "gidNumber" required by object class "posixAccount" [root@389-ds opt]# Any Idea what i have missed?