Hello,
I'm sorry but I don't understand your issue.
You have a coupon and its discount is the shipping price.
If you want a shipping with "0.00" price ; you will have to create a special shipping method.
But a coupon is a coupon ; a line in the cart which have a negative value.
And that coupon is applied on the shipping, with the value of the shipping..
So for what we can see ; it's working fine !
Regards,
Jerome - Obsidev.com
HikaMarket & HikaSerial developer / HikaShop core dev team.
Also helping the HikaShop support team when having some time or couldn't sleep.
By the way, do not send me private message, use the "contact us" form instead.