Market press not working right

Hi I am having some problems with your market press plugin. It was working fine and now when you hit the add to cart button it just spins and nothing happens. I also have another problem. This happened when we could put stuff in to the shopping cart. When you remove the item from the cart there would be like 4 lines of code that would be displayed across my page. It looks terrible.

I can't really show you that problem now because nothing will go in to the shopping cart at this point. It was working fine before and now it doesn't Not sure what to do. Please advise.

Thank you