WP-Ecommerce, not working right when I click on a product

I’m trying to build a store, which I’ve put at https://jamaicanmecrazy.biz/ for now. When I click on one of the product images, the link looks right, but the individual product page does not load.

So for instance, when I view all products, I see all the products. When i click on one product, it takes me to the right link of the individual product page, but nothing changes on the screen.

https://jamaicanmecrazy.biz/?page_id=4/accessories/lucite-glasses/
looks the same as
https://jamaicanmecrazy.biz/?page_id=4/

WP E-commerce & gold cart used to work.