createing new user

I m new at ejabberd I tried to implement i new ejaberd IM server. So i insltall
ejabberd-1.1.3-1.fc7.i386
ejabberd-doc-1.1.3-1.fc7.i386

and all other dependenci in myserver.
And tried to configure. Everything was default when i tried to run web interface its want a user and password. i know my admin user can get access. thats why i edit /etc/ejabberd/ejabberd.cfg fie.....

% Users that have admin access. Add line like one of the following after you
% will be successfully registered on server to get admin access:
%{acl, admin, {user, "www-admin"}}.
%{acl, admin, {user, "ermine"}}.
....

But i dont know how to set password for user www-admin OR create a new user for ejabberd.

I tried with ..

% ejabberdctl node@host register admin example.org password

like this. but it say
node@nonode

.................
So how can i create a new admin user for ejabberd.
please help please please...................