[Samba] vampire failed for undefiled value sambaSID

[ksun at ABINITIO.COM]

Greetings!

Vampaire process is running, but it failed create accounts for everyone. 
The error message is 
                       "Can't call method "get_value" on an undefined 
value at /var/lib/samba/sbin/smbldap-useradd.pl line 152."

And I looked at the mentioned file and the line is
        $userGroupSID = $group_entry->get_value('sambaSID');

I am following examples in "Samba-3 by Examples".
Configuration:
        Fedora Core 2
        Samba-3.0.3 that came with Fedora Core 2
        smbldap-tools that came with Samba-3.0.3

It looks like it is the smbldap-tools issue.  I briefly looks at the two 
pm files but cannot figure out where it went wrong.

Any suggestions?

Thanks!

--- Kang Sun