title: how to enable Instant Payment Notification Preferences of sandbox account?
body: <p>in two years ago, i remember how to add how to add the notify url</p>
  
  <ol>
  <li>Click Profile on the My Account tab.</li>
  <li>Click Instant Payment Notification Preferences in the Selling Preferences column.</li>
  <li>Click Choose IPN Settings to specify your listener’s URL and activate the listener.</li>
  </ol>
  
  <p>but i want to test (don't use simulator) IPN, i can't find the selling preference column under the My account tab~</p>
  
  <p>does it any changes between this two years?</p>
  
  <p>thanks</p>