title: Paypal Sandbox Token Expired
body: <p>Previously this was working all right, but I think paypal iv has done some changes and now I can't figure out how to get it working. I always get this response :</p>
  
  <p>"This Express Checkout session has expired. Token value is no longer valid."</p>
  
  <pre><code>array(9) {
  ["TIMESTAMP"]=&gt;
  string(28) "2013%2d01%2d30T16%3a47%3a32Z"
  ["CORRELATIONID"]=&gt;
  string(13) "1c384dff48bb7"
  ["ACK"]=&gt;
  string(7) "Failure"
  ["VERSION"]=&gt;
  string(6) "76%2e0"
  ["BUILD"]=&gt;
  string(7) "4181146"
  ["L_ERRORCODE0"]=&gt;
  string(5) "10411"
  ["L_SHORTMESSAGE0"]=&gt;
  string(54) "This%20Express%20Checkout%20session%20has%20expired%2e"
  ["L_LONGMESSAGE0"]=&gt;
  string(103) "This%20Express%20Checkout%20session%20has%20expired%2e%20   %20Token%20value%20is%20no%20longer%20valid%2e"
  ["L_SEVERITYCODE0"]=&gt;
  string(5) "Error"
  }
  </code></pre>