Shipping rules help

[coppo82]

hi guys i'm building a wine e-commerce with virtuemart 2.0.8C and i have the follow problem

in my shop i sell bottles of 0,75 Lt  ,  1 Lt , 1,5 Lt

the basic shipping rule is  5 € shipping cost   or free for 12 product or buying 75 €

the problem born because sometime i have 1 product called   "Box with 20 bottles special price" and when i add that product in the cart ovviusly the system see only one product then the free price over the 12 product can not be done

i try to play with the weight but nothing work fine

can please someone tell me how i can configure the shipping rules for that problem ??

thanks a lot .

Andrea.

[coppo82]

there is no one guy of the stuff that can help me my website it's finish i just need to solve this problem.

please help guys .