title: Why is Paypal displaying SUCCESS and $_POST variables Paypal's site instead of returning to my return_url
body: <p>Please help me.  I'm at a total loss.  After more than 2 days of Googling everything I can think of, I still have no answers.  This DID work in the Sandbox.  My code for sending the tx and token to Paypal.  </p>
  
  <pre><code>&lt;form name='verification' action='https://www.paypal.com/cgi-bin/webscr' method='post'&gt;
      &lt;input type='hidden' name='at' value='$atoken' /&gt;
      &lt;input type='hidden' name='tx' value='$tx' /&gt;
      &lt;input type='hidden' name='rm' value='2' /&gt;
      &lt;input type='hidden' name='cmd' value='_notify-synch' /&gt;");
      print("&lt;input type='hidden' name='return' value='$returnUrl' /&gt;");
      print("&lt;input type='submit' name='submit' value='PDT'&gt;");
  print("&lt;/form&gt;");
  </code></pre>