Check out problem - missing shipping page

I have installed Market Press on a Wordpress website hosted on Godaddy. Word press is in a folder called "store" so the URL is http://powerofwho.com/store/

When you go to checkout and you click the checkout Now button the next page cannot be found.
http://powerofwho.com/store/store/shopping-cart/shipping/ It says it is the "shipping" page. Not sure what is going on here.