hi there i'm trying to get Fedora Directory Server and Samba to work together but i've kinda hit a brick wall at the moment

when i try and add a machine account using the following command i get this? can someone help me out maybe? i know VERY little about ldap so please bear with me, i'm trying to learn.

[root@fedora /]# smbpasswd -a -m pma$
failed to add domain dn= sambaDomainName=FEDORA,dc=**,dc=**,dc=**,dc=**,dc=** with: Object class violation
unknown object class "sambaDomain"

Adding domain info for FEDORA failed with NT_STATUS_UNSUCCESSFUL
ldapsam_modify_entry: Failed to add user dn= uid=pma$,ou=Machine Accounts,dc=school,dc=cathedral,dc=qld,dc=edu,dc=au with: Object class violation
unknown object class "sambaSamAccount"

ldapsam_add_sam_account: failed to modify/add user with uid = pma$ (dn = uid=pma$,ou=Machine Accounts,dc=**,dc=**,dc=**,dc=**,dc=**)
Failed to add entry for user pma$.
Failed to modify password entry for user pma$