Click to complete subscription missing button...

Hello,

I've been playing around with the Membership plugin trying to get it to work and setup and I think it's pretty much as I'd like it to work now apart from when someone registers, there is no button to click and confirm subscription...

The message I get is:
Please check the details of your subscription below and click on the relevant button to complete the subscription.

The site is a site which needs the content to be hidden apart from internal staff so a visitor to the site won't see anything until they register and are approved. It's a free site so all the payment gateways are turned off. If I turn one of them on the button shows but doesn't do anything when clicked...

Any ideas?

http://brand.functionpixel.com/register

Many thanks