Warning: require_once(Zend/OpenId/ResponseHelper.php): failed to open stream: No such file or directory in /var/www/html/ZendFramework-1.12.17/tests/Zend/OpenIdTest.php on line 31

Fatal error: require_once(): Failed opening required 'Zend/OpenId/ResponseHelper.php' (include_path='.:/var/lib/pear:/usr/share/library:/var/www/html/smarty/libs:/usr/local/lib/Classes') in /var/www/html/ZendFramework-1.12.17/tests/Zend/OpenIdTest.php on line 31