Shipping is not showed in total order

hi guys i'm new of the opencart world, i'm installed the last version 1.5.6 configured all, but the shipping module isn't showed in the checkout confirmation and is not calculate i have put "for item" and others types of shiping but never shoy the costs of shipping, can you help me, i'm forget any pass? in installation? thanks!

You need to mark all products as "Requires Shipping: Yes". Also, make sure your "Shipping" Order Total is enabled in Extensions > Shipping.