Ensure the discount code is set up within the Code Library: 

1. Navigate to Control > Code Library > Discount Code
2. Click Edit next to the code and note that the code is case sensitive

1. Navigate to Communities>Special Events>Friends Asking Friends>Kintera Thon
2. Hover over the event and select Website Info
3. Click Fee Structure
4. Click Discount next to the Registration Type that the code should be applied to
5. Verify the correct discount code is selected, if not select the discount code, Save and navigate back to the Webinfo Checklist and click  the green Publish This Event Now button