[Samba] Password Sync not letting users to change password.

[Avinash Rao]

Dear all,

Ubuntu 8.04 Server
Samba 3.0.28a configured as PDC.

I want to give options to samba users to change their own passwords and sync
it with the unix passwords whenever they change it.

I have used the following in my smb.conf file

unix password sync = yes
passwd program = /usr/bin/passwd %u
passwd chat = *Enter\snew\s*\spassword:* %n\n *Retype\snew\s*\spassword:*
%n\
n *password\supdated\ssuccessfully* .

I get an option to change the password in winXP but, after entering the new
password, the server returns "You don't have permissions to change your
password"

can anybody help me
Avinash