Coupons (one time use)

-- url of the page with the problem -- : bestedernewsletters.com
-- HikaShop version -- :Essentials
-- Joomla version -- : x.x
-- PHP version -- : x.x.x
-- Browser(s) name and version -- : XXXXX x.x.x
-- Error-message(debug-mod must be tuned on) -- : Error_message

I have created a coupon that I only want to be used ONCE.

However, I did a test and used it but it's still showing that there's one use left.

Help me understand how to set it up so that it can only be used one time.

Thanks!

I guess I didn't go all the way through...I entered the coupon code and clicked NEXT but didn't actually complete the order.

It works now when I complete the order.

Thanks