Trouble getting Marketpress setup

Hi there,

I am having difficulty setting up this plugin for a client of mine. She purchased the plugin and I have added it to her wordpress site for her. Unfortunately, when I add products to the store they are not showing at any of the links displayed on the store page that is created. In fact, when I click on the "products" link or the "shopping cart" link I ma taken to an unformatted page. You can see what I am talking about when you visit here:

http://miabellatucson.com/store

Apparently I am missing a step or two. Because a page was created for a particular category but the add to cart buttons do not work either:

http://miabellatucson.com/black-friday-specials/

Please let me know what I need to do to make this work. If you could, please email me at jonnieallan@tlomg.com with what I need to do to get this up and running for her. Thanks.