Checkout for products with variants

-- HikaShop version -- : 2.6.0
-- Joomla version -- : 3.4.0
-- PHP version -- : 5.3.29
-- Browser(s) name and version -- : Chrome
-- Error-message(debug-mod must be tuned on) -- : The maximum weight is too big for all the shipping methods

Hi,
I need some help please! I don't know why but on my website if I try to buy an item without variants or characteristics everything works, but if I try to buy an item with variants after the login the sistema says it'should not possible because the total weight of the item is too big for all the shipping methods but it's not true, I have setted 3 different shipping methods from wehight 0,1 to 1 kg, 1,1 to 4 and 4,1 to 50.
The item price does not change with different variants, it''s always the same.
Does someone knows why with the variants the sistem does not work?
Thanks!

Hi,

Please give us a screenshot of the settings of one of the variant having the issue.
And potentially screenshot of the shipping methods.