I have 1.3.3 set up, and I can't figure out to get users to log in.

http://phpwiki.sourceforge.net/demo/en/?auth\[login]=foo
will bring up the login page, but there seems to be no way to create an account. 

I can create the page
http://phpwiki.sourceforge.net/demo/en/foo
and edit it with no problem, but I want to require usesr to log in before they can edit pages.

Has this been set up yet, and how do I do it?
thanks