Add to cart button does not add products to cart

On my store page (http://4rmg.com/store/), when I click the “add to cart” button and then click on the “view cart” button, I get a page that has my web site header, menu, and footer, but nothing else. Did I miss a step in set-up? Do I have to do something to enable the “add to cart” buttons? do I have to set up the cart page? If so, what do I have to do?

http://wordpress.org/plugins/woocommerce/