Hi guys I upgraded my online shop from zen cart 1.39 to 1.5 and ultimate seo urls breaks it, when I add a product to the shopping cart, it gives me 404 error. I checked out the ultimate seo urls page in zen-cart.com and found it only work with zencart 1.39, so what should we do? I think we eventually should upgrade to zencart 1.5, right? Thanks for any help.