Since this is not working for anyone I contacted vapordna and found out you have to create an account in referral candy. Here is the response I got from vapordna:
Dear Michael,
Thank you for your inquiry and we apologize for the inconvenience. For the referral program to work, you must create an account in referral candy, the link is here:
http://vapordna.referralcandy.com/
Once that is created, referral candy gives you a unique VaporDNA link that must be used to recognize you referred the new customer. At check out, the coupon code must be entered to. If the customer you referred does not use the link and enter the code, you do not get credit. A lot of times, customers just share the code, but the code does not validate the account as a referral if the link is not used.
After you enter your email and hit enter on the next page there is a link at the top right that says: "Track your rewards" click on that link to then set a password and they will send a confirmation email you will have to click to confirm.
Here is my referral code, if someone who has not used it yet for any orders tries it and orders something I can confirm if I got the coupon and am able to use it.
http://vapordna.refr.cc/KHW9QF7