Zend Calendar Zend_Gdata_App_HttpException' with message 'Expected response code 200, got 401 - zend-framework

Question

I want inteface this script with google calendar using Zend Framework.
This code works locally but doesn't works on altervista.
The error is
Fatal error: Uncaught exception 'Zend_Gdata_App_HttpException' with
message 'Expected response code 200, got 401
<?php
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');
$user = "xxx#gmail.com";
$pass = "xxxxx";
$title= "Evento ";
$content="evento presso nome associaizone";
$where="luogo";
$service = Zend_Gdata_Calendar::AUTH_SERVICE_NAME;
try {
$client = Zend_Gdata_ClientLogin::getHttpClient($user, $pass, 'cl');
} catch (Zend_Gdata_App_CaptchaRequiredException $cre) {
echo 'URL of CAPTCHA image: ' . $cre->getCaptchaUrl() . "\n";
echo 'Token ID: ' . $cre->getCaptchaToken() . "\n";
} catch (Zend_Gdata_App_AuthException $ae) {
echo 'Problem authenticating: ' . $ae->exception() . "\n";
}
$service = new Zend_Gdata_Calendar($client);
//
// Create a new entry using the calendar service's magic factory method
$event= $service->newEventEntry();
// Populate the event with the desired information
// Note that each attribute is crated as an instance of a matching class
$event->title = $service->newTitle($title);
$event->content= $service->newContent($content);
$event->where = array($service->newWhere($where));
// Set the date using RFC 3339 format.
$startDate = "2014-03-18";
$startTime = "14:00";
$endDate = "2014-03-19";
$endTime = "16:00";
$tzOffset = "-08";
$when = $service->newWhen();
$when->startTime = "{$startDate}T{$startTime}:00.000{$tzOffset}:00";
$when->endTime = "{$endDate}T{$endTime}:00.000{$tzOffset}:00";
$event->when = array($when);
// Upload the event to the calendar server
// A copy of the event as it is recorded on the server is returned
$newEvent = $service->insertEvent($event);
?>

Answer 1

Zend_Gdata and ZendGData are out of maintenance.
Instead the recomendation is migrate to the official Google SDK https://code.google.com/p/google-api-php-client/