samba - Jan 2008 - can't use Swat to add new user

Using Centos 4.6 + Samba/Swat 3.0.25b, all used binary install

Swat work fine at port 901 (and even using behind stunnel), and can edit 
smb.conf.

But at 'Password' page, after typed in 'User Name', 'New
Password', '
Re-type New Password' at 'Server Password Management' section, it
shown
no message and even can't add new user to samba/linux system. (used 
'root' to login already)

Is it needed to add 'add user script'/'delete user script' value
at
smb.conf? Coz currently had not added those value at samba conf file
.

   Thank for helping.