No register button

I have just downloaded the plugin, and everything is great, apart from the fact there’s no ”register” button …(when you’re not logged in, obviously). I have been through all of the settings (including the ‘login/register’ section) and I can’t see anything that I’ve missed here! This is so strange, as the plugin is literally usesless without the ability to register. Am I doing something wrong? Please help!..

The page I need help with: [log in to see the link]