1. Make sure you are logged into the COwheelers.com website
   
2. Click on your name (top right)
   
3. Click on “My event registration” tab (circled below)
   
4. Click on 2nd or 3rd column of the row that contains the event you want to unregister  
   (NOT the highlighted link in the first column)  <== most likely cause of a problem
5. Click on Cancel Registration
   

Video:

Screenshot: