Membership Plugin Isn't Working Properly

Hi, I've setup a test membership level (free) that I am trying to get to work on http://orangutanmarketing.com/members/

However every time I try to register an account, firstly the member is held for moderation and is not automatically 'activated'.

Second, it doesn't forward users to the 'welcome' page I have designated for successful signups. It just asks users if they would like to upgrade, but I haven't set any upgrades

Any ideas?

Cheers,

-William