我试图在Google日历API中做一些应用。我做了一切必要的事情，使检索一个列表的日历的授权用户根据这个https://developers.google.com/google-apps/calendar/v1/developers_guide_php#RetrievingCalendars手册我写这个代码

<?php
$clientLibraryPath = 'phpGoogle/library';
$oldPath = set_include_path(get_include_path() . PATH_SEPARATOR . $clientLibraryPath);
require_once 'Zend/Loader.php';
Zend_Loader::loadClass('Zend_Gdata');
Zend_Loader::loadClass('Zend_Gdata_AuthSub');
Zend_Loader::loadClass('Zend_Gdata_ClientLogin');
Zend_Loader::loadClass('Zend_Gdata_Calendar');
function getCurrentUrl()
{
return  "http" . (($_SERVER["HTTPS"] == "on") ? "s://" : "://") . $_SERVER['HTTP_HOST'] . $_SERVER['REQUEST_URI'];
}
function getAuthSubUrl()
{
  $next = getCurrentUrl();
  $scope = 'https://www.google.com/calendar/feeds/';
  $secure = false;
  $session = true;
  return Zend_Gdata_AuthSub::getAuthSubTokenUri($next, $scope, $secure,
      $session);
}
$authSubUrl = getAuthSubUrl();
echo "<a href='"$authSubUrl'">login to your Google account</a>"; 
if(! isset($_SESSION['sessionToken']) && isset($_GET['token'])) {
  $_SESSION['sessionToken'] =
      Zend_Gdata_AuthSub::getAuthSubSessionToken($_GET['token']);
}
$client = Zend_Gdata_AuthSub::getHttpClient($_SESSION['sessionToken']);
echo $_SESSION['sessionToken'];
function outputCalendarList($client)
{
  $gdataCal = new Zend_Gdata_Calendar($client);
  $calFeed = $gdataCal->getCalendarListFeed();
  echo '<h1>' . $calFeed->title->text . '</h1>';
  echo '<ul>';
  foreach ($calFeed as $calendar) {
    echo '<li>' . $calendar->title->text . '</li>';
  }
  echo '</ul>';
}
?> 

在用户身份验证后，它给了我这个错误致命错误：未捕获的异常"Zend_Gdata_App_AuthException"，消息为"令牌升级失败"。原因：令牌已吊销

令牌已撤销

错误403

网上的应用程序在这里http://lokys.cz/testGoogle/calendar.php所以你可以试试这个问题。你有人能帮我吗？

谢谢。