Blogs MU Join button problem and other questions

I have the latest version of BlogMu and Buddy press and WP installed. I disabled the regular registration for WP users in the wp settings. I was wondering why when you click on join that nothing happens. The page just refreshes. /register goes no where but back to home page.

2. I also setup the membership plugin and was hoping it could create a /register page and add the [subscription] tag so that when a user clicks join they are prompted to viewing the page that I created but this doesn't work. am I doing something wrong here or missed something?