我用Getting Started with Zend_Auth 这个例子，在做到退出的时候出现的问题

Fatal error: Uncaught exception 'Zend_Controller_Dispatcher_Exception' with message 'Invalid controller specified (index.php)' in D:\AppServ\www\library\Zend\Controller\Dispatcher\Standard.php:193 Stack trace: #0 D:\AppServ\www\library\Zend\Controller\Front.php(911): Zend_Controller_Dispatcher_Standard->dispatch(Object(Zend_Controller_Request_Http), Object(Zend_Controller_Response_Http)) #1 D:\AppServ\www\index.php(27): Zend_Controller_Front->dispatch() #2 {main} thrown in D:\AppServ\www\library\Zend\Controller\Dispatcher\Standard.php on line 193

不知道这段提示是什么意思？

不用Zend_Auth的时候正常吗？