thanks for reply,
products are correctly imported also considering the different philosophies about attributes management, i can edit them and they are correctly showed in storefront, but cart remains empty.
if you want give a look, this is a product.
https://www.wnc2.biz/presta17/Creatina-Monoidrata/17085-SCITEC-NUTRITION-CREATINE-ULTRAPURE-500gr.html