title: The link you have used to enter the PayPal system is invalid. Please review the link and try again
body: <p>I'm trying to test a paypal form through the sandbox, and have created a preconfigured test account. </p>
  
  <p>However, when I go through my paypal form and enter the password I am proceeded with this error: </p>
  
  <p><strong>"The link you have used to enter the PayPal system is invalid. Please review the link and try again."</strong> </p>
  
  <p>I am unsure what this error means. I removed my email address I am aware it shows as xxxxxxxx@gmail.com in the example below.</p>
  
  <p>My form is below:</p>
  
  <pre><code>&lt;form name "_xclick" action="https://www.sandbox.paypal.com/cgi-bin/webscr" method="post"&gt;
  
  SteamID: &lt;input type="text" name="item_number" value="&lt;?php echo $steamid;?&gt;" size="45"&gt;
  &lt;br&gt; &lt;?php echo $possible;?&gt;
  &lt;input type="hidden" name="item_name" value="Seriouspants Donation &lt;?php echo $steamid;?&gt;"&gt;
  &lt;input type="hidden" name="cmd" value="_xclick-subscriptions"&gt;
  &lt;input type="hidden" name="no_note" value="1"&gt;
  &lt;input type="hidden" name="business" value="xxxxxxxx@gmail.com"&gt;
  &lt;input type="hidden" name="currency_code" value="USD"&gt;
  &lt;input type="hidden" name="no_shipping" value="1"&gt;
  &lt;input type="hidden" name="return" value="http://seriouspants.net/customs/paypal/complete.php"&gt;
  &lt;input type="hidden" name="a3" value="5.00"&gt;
  &lt;input type="hidden" name="p3" value="1"&gt;
  &lt;input type="hidden" name="t3" value="M"&gt;
  &lt;input type="hidden" name="src" value="1"&gt;
  &lt;input type="hidden" name="sra" value="1"&gt;
  &lt;br /&gt;&lt;br /&gt;
  &lt;input type="submit" name="Submit" value="Submit"&gt;
  
  &lt;/form&gt;
  </code></pre>