Not Aligning

I just installed the latest version of Register Plus Redux and I have tried editing the PHP file, the CSS box included in the plugin, and nothing will align the plugin the way I would like it to. I want it to be centered and you can see the top part. I am using Shuttershot by web2feel.

Here is the page:
http://nevaehsrealm.com/wp-signup.php

http://wordpress.org/extend/plugins/register-plus-redux/