New membership site - home page is going to the forum, not the designated page

I've set up a new blog through multisite, and installed membership on it, and also the forum plugin, I've set up one forum and created a page with the forum code on it.

I've set the home page as a page caleld "members Only". I've set up the stranger level (called non-members).

When I browse to the site, the forum is the page that loads. If I deactivate the forum then the default page is a 404.

How can I get Membership to recognise my welcome page as the default?

the url is

(all plugins, Wp etc are latest versions)

All help greatly appreciated!