samba - Jul 2006 - unable to smbpasswd -a

Dear Expert,
I am very new with this, I was unable to smbpasswd -a .. could any body
please help .. what have I missed?

Thanks & Regards
Win


[root@samba guest]# smbpasswd -a user3
Failed to issue the StartTLS instruction: Protocol error
Connection to LDAP server failed for the 1 try!
New SMB password:
Retype new SMB password:
Failed to issue the StartTLS instruction: Protocol error
Connection to LDAP server failed for the 1 try!
Failed to issue the StartTLS instruction: Protocol error
Connection to LDAP server failed for the 1 try!
ldapsam_modify_entry: Failed to modify user dnuid=user3,ou=Users,dc=lippogener
al,dc=com with: Strong(er) authentication required
        modifications require authentication
ldapsam_update_sam_account: failed to modify user with uid = user3, error:
modif
ications require authentication (Success)
Failed to modify entry for user user3.
Failed to modify password entry for user user3
[root@samba guest]#


***********************
Our outgoing mail has been scanned by MSS.
***********************