Coupon

Hello all,
As you can see I bought Hikashop-business and hikaSerial.
I created a hikaSerial-plugin and a hikaserial-pack.
Further I can integrate the serial-pack into the product in Hikashop.
But I do not find the coupon on the front-end when I click on the front-endproduct.
Strange!! What do I wrong ??

Can somebody help me ?

Thanks in advance

thank you for the reply.
But is there a possibility to place an editable textfield on the front-end of a product.
I mean, if a public-end user buys a gift-certification, where or how can he place the amount of the giftcard.
I tought to create a productpage called "giftcard", and the front-enduser could place the amount in a textfield, and next
he would be redirected to the checkout.
I do not know if something like that is possible in Hikashop.

Many thanks in advance for the reply.

greetings