shopping-cart

since some weeks I have a problem with my Prestashop 1.4.0.12 When I add a product to cart, ajax works correctly and add the product very well. But, if I change page, or sometimes adding a product, the cart change deleting all products on refresh a new page. Sometimes I can move within some pages, but dissapears the products of the cart and later if I have a new cart returns to the old cart. Anybody knows about it? I think that the problem is on id_guest but I need to know if anyone have some solution Thanks! The problem is on Domain Name, that site have 3 domains, and there are a function on

I'm using opencart version 1.5.5.1 for our website. I need to add more than one option for products. For example: I need to show shirts of sizes- Large/Medium/Small and colors White/Black/Blue/Red/Green etc. By default opencart allows us to add separate quantities for each color and size. How can I mention that we've 5 Large Shirts of Blue Color, 3 Medium Shirts of White Color etc. ? Please help. Thanks in Advance! I guess this would only be possible if You create an options for size x color combinations only. Customer then would have to pick the desired size and color in one option, like: S,