samba - Nov 2006 - 3.0.23d - unix sync passwd & passwd program

When I had 3.0.23c my scripts work correcty, since I update I realiza the new 
param "unix sync passwd = yes" to permit passwd program to work. 
However, it
does not work at all, it fails, windows tells authentication fails (only when 
changing password) and samba logs tells something like 
NT_WRONG_PASSWORD_STATUS.

Sign in into domain works very well. Just changing password.  If I call script 
from command line with same params as samba it works and password is changed.


Any suggestion,

Regards,

LD