[Samba] can't use Swat to add new user

[martin]

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.