Ultimate Demon Affiliate coupon not work

[zx123]

I started to promoting ultimatedemon, I created the 50$ off coupon, but when I insert it to see if work I get this:
"The gift certificate or promotional code is not valid."
Why?
If I use other coupons from other users, I get the 50$ off. I enabled the coupon too... LOL
I have already some traffic for the offer but not converting because they not see the 50$ off
someone can help me?

 

[drywallrob]

I started to promoting ultimatedemon, I created the 50$ off coupon, but when I insert it to see if work I get this:
"The gift certificate or promotional code is not valid."
Why?
If I use other coupons from other users, I get the 50$ off. I enabled the coupon too... LOL
I have already some traffic for the offer but not converting because they not see the 50$ off
someone can help me?

Send the traffic to my link!

Just kidding. Try to make it 10% off. I think they only allow a 10% discount now. They want to make money and not give it away.

 

[zx123]

Not work also if I put 7%

 

[rpkrocks]

it works you just have setup it rightly