affiliate code not registering sales for affiliates

Hello

I installed the affiliate plugin and gave out an affiliate code to an affiliate. He said it wasn’t registering sales. I took his code and opened an icognito window in Chrome, paid for one of my products with his link and sure enough it didnt register. It DID register a unique click, but no sale. Can you help me please?

My website is UltimateBasicTraining.com.

The page where you pay is UltimateBasicTraining.com/complete-enrollment

I set up a test page if you would like to test the a $1 product with his affiliate code (click the picture on the left, it says $25/month but I set it at$1): http://www.ultimatebasictraining.com/test-2

The affiliate code I am testing is: http://www.ultimatebasictraining.com?ref=MSwaney-15