Have you tried to not log in first, but add the plane to the shooping cart, then after clicking check out you'll need to log in. Maybe it'll work when you're at that stage. Or, if that fails, but you are logged in (allow all cookies to be accepted for that try) and taken back to home, to use the direct links: 1. http://www.x-aviation.com/catalog/ 2. http://www.x-aviation.com/catalog/product_info.php?products_id=57 ("add to cart") 3. http://www.x-aviation.com/catalog/shopping_cart.php ("checkout") 4. now it want your login and should take you to the payment site. And again, try another browser again. Safari if Firefox fails, e.g.