Related products doesn't work

Hi,
I'm trying to use the feature of Related products in this mode:
product_a --> category_a
product_b --> category_b

product_a--> Related --> product_b

I have created a content module following the documentation found on the site:
www.hikashop.com/en/support/documentatio...ct-form.html#related .

The result is this in attach (result1.png).

The products are displayed only if I choose a one category (a or b), but however I don't see the correlation between different products and different categories (see attach result2.png) .

Can you help me?

Thanks,

Fabio

Hi,

When displaying the products of the category a, you can attach a module to the menu, and this module have to display the products of the category b.