title: paypal return and IPN url with parameters
body: <p>here is the form i am submitting for a recurring payment to paypal</p>
  
  <pre><code> &lt;form name='_xclick' id='_xclick' action='https://www.sandbox.paypal.com/cgi-bin/webscr' method='post'&gt;
          &lt;input type='hidden' name='cmd' value='_xclick-subscriptions'&gt;
          &lt;input type='hidden' name='business' value='sandboxusername@gmail.com'&gt;
          &lt;input type='hidden' name='currency_code' value='EUR'&gt;
          &lt;input type='hidden' name='no_shipping' value='1'&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='custom' value='customerId=F5C151'&gt;
          &lt;input type='hidden' name='src' value='1'&gt;
          &lt;input type='hidden' name='sra' value='1'&gt;
          &lt;input type='hidden' name='item_name' value='Lev haolam package'&gt;
          &lt;input type='hidden' name='cancel_return' value='mydomainsuccess?pplstatus=0&amp;customerId=F5C151'&gt;
          &lt;input type='hidden' name='return' value='mydomainsuccess?pplstatus=1&amp;customerId=F5C151'&gt;
          &lt;input type='hidden' name='notify_url' value='mydomainsuccess?pplstatus=1&amp;customerId=F5C151'&gt;
          &lt;/form&gt; &lt;form name='_xclick' id='_xclick' action='https://www.sandbox.paypal.com/cgi-bin/webscr' method='post'&gt;
          &lt;/form&gt;
  </code></pre>
  
  <p>problem is when the customer comes back from paypal he does get back to the success page but im not getting back the extra parameters ... all i get is</p>
  
  <pre><code>?auth=AawipXhP8kGL5tRWEYuMZDowOdxbyXhwGGShlkbdAgL1wnIV5jMHw1QImcj0KmiFUyhrU6kw4mfc3fJPJ3leDZQ&amp;form_charset=UTF-8
  </code></pre>
  
  <p>what am i missing ?</p>