[Samba] Windows user password changing with Samba + LDAP + smbldap tools

[taso]

smbldap-tools-0.9.1-1 & Samba 3.0.21a

This is what I have in my smb.conf:

     passwd program = /opt/IDEALX/sbin/smbldap-passwd "%u"
     passwd chat = "*New password :*\n" %n "*new password :*\n" %n
     unix password sync = Yes


According to "man smb.conf", smbldap-passwd is invoked as root so the
passwd chat should be fine.

Problem is it doesn't work.

Am I missing something obvious?