Category Discount doesn't work

-- HikaShop version -- : Business: 2.3.5
-- Joomla version -- : 3.2.3
-- PHP version -- : 5.3.3

Hello.

I configured a discount like this entry said, but when I am configuring my discount (see attached image) and I assign my Discount Category, when I save the discount, category I assigned disapear!!!, and in check out process doesn't apply the discount.

What happend?, why I can't use my category in discount? Do I need to do something in the configuration?

I tried to apply only the category, the product with the category, and only the product, and discount doesn't apply in check out.

Regards

Ok, Thanks