how do I become a domain administrator

[Michael.Keightley at quadstone.com]

I want to setup a domain administrator in Samba 2.1prealpha.
I setup the files below,  but when I login I'm not an administrator.  
What am I doing wrong?

/etc/group
----------
pcadm::5000:mk

smb.conf
--------
  domain user map = /home/samba_wallace/lib/domainuser.map
  domain group map = /home/samba_wallace/lib/domaingroup.map
  local group map = /home/samba_wallace/lib/localgroup.map

domainuser.map
--------------
mk=administrator

domaingroup.map
---------------
pcadm="Domain Admins"

localgroup.map
--------------
pcadm=BUILTIN\Administrators
-- 
Michael Keightley <Michael.Keightley at quadstone.com>    Tel: +44 131 220 4491
Systems Manager,  Quadstone Limited,                   Fax: +44 131 220 4492
16 Chester Street,  Edinburgh EH3 7RA,  Scotland       http://www.quadstone.com