samba & ldap problem

[Luca Ferrari]

Hi,
I'm trying to configure my samba server to accept accounts that are exported 
by the ldap server (same machine), but when I follow instructions at

http://www.howtoforge.com/openldap-samba-domain-controller-ubuntu7.10-p2

and try to populate the accounts I get:

adding new entry: sambaDomainName=sambaDomain,dc=myDomain,dc=com
failed to add entry: naming attribute 'sambaDomainName' is not present in 
entry at /usr/sbin/smbldap-populate line 495, <GEN1> line 21.

and after that I cannot login into a samba share (NT_STATUS_ACCESS_DENIED).
Any idea about that?
I don't know what this error could be related to.

Thanks,
Luca