Disculpa la molesti GatorV, mis scripts que tengo son:
 
index.php 
 Código PHP:
    <?php
 
// Define path to application directory
defined('APPLICATION_PATH')
    || define('APPLICATION_PATH', realpath(dirname(__FILE__) . '/../application'));
 
// Define application environment
defined('APPLICATION_ENV')
    || define('APPLICATION_ENV', (getenv('APPLICATION_ENV') ? getenv('APPLICATION_ENV') : 'production'));
 
// Ensure library/ is on include_path
set_include_path(implode(PATH_SEPARATOR, array(
    realpath(APPLICATION_PATH . '/../library'),
    get_include_path(),
)));
 
/** Zend_Application */
require_once 'Zend/Application.php';  
//$front = Zend_Controller_Front::getInstance();
//$front->setControllerDirectory('../application/controllers');
//$frontController->setBaseUrl('/localhost/noticias2');
//$front->throwExceptions(true);
 
// Create application, bootstrap, and run
$application = new Zend_Application(
    APPLICATION_ENV, 
    APPLICATION_PATH . '/configs/application.ini'
);
$application->bootstrap()
            ->run();    
  y en el bootstrap.php tengo  
 Código PHP:
    <?php
 
class Bootstrap extends Zend_Application_Bootstrap_Bootstrap
{
    private $_acl = null;
    
    protected function _initAutoload() {
        $modelLoader = new Zend_Application_Module_Autoloader(array(
                        'namespace' => '',
                        'basePath' => APPLICATION_PATH.'/modules/default'));
        
        if(Zend_Auth::getInstance()->hasIdentity()) {
            Zend_Registry::set('level', Zend_Auth::getInstance()->getStorage()->read()->level);
        } else {
            Zend_Registry::set('level', 'guests');
        }
        
        $this->_acl = new Model_ControlAcl;
        $this->_auth = Zend_Auth::getInstance();
        
        $fc = Zend_Controller_Front::getInstance();
        $fc->registerPlugin(new Plugin_AccessCheck($this->_acl));
        
        return $modelLoader;
    }
    
    function _initViewHelpers() {
        $this->bootstrap('layout');
        $layout = $this->getResource('layout');
        $view = $layout->getView();
        
        $view->setHelperPath(APPLICATION_PATH.'/helpers', '');
        
        $view->doctype('HTML4_STRICT');
        $view->headMeta()->appendHttpEquiv('Content-type', 'text/html;charset=utf-8')
                        ->appendName('description', 'Using view helpers in Zend_view');
        
        $view->headTitle()->setSeparator(' - ')
             ->headTitle('Control Operativo v.0.4 - AVM Aduanera SAC');
        
        $navContainerConfig = new Zend_Config_Xml(APPLICATION_PATH . '/configs/navigation.xml', 'nav');
        $navContainer = new Zend_Navigation($navContainerConfig);
    
        $view->navigation($navContainer)->setAcl($this->_acl)->setRole(Zend_Registry::get('level'));
        
        $view = new Zend_View();
        $view->addHelperPath("ZendX/JQuery/View/Helper", "ZendX_JQuery_View_Helper");
        /*$viewRenderer = new Zend_Controller_Action_Helper_ViewRenderer();
        $viewRenderer->setView($view);
        Zend_Controller_Action_HelperBroker::addHelper($viewRenderer);*/
    }
    
    protected function _initLocale(){
 
    $locale = new Zend_Locale();
    $locale->setLocale('es_ES');
    Zend_Registry::set('Zend_Locale', $locale); // la registramos para su futuro uso en el resto de la aplicación
}
 
protected function _initPlugins(){
        $this->bootstrap('frontController');
 
        $plugin = new My_LayoutPlugin();
        $this->frontController->registerPlugin($plugin);
        $this->frontController->throwExceptions(true);
    }
    
 
}    
  es en este en donde puse lo q me señalaste(ultima linea de codigo):  
 Código PHP:
    $this->frontController->throwExceptions(true); 
    
  Estara bien ahi?? 
con eso se resolverá el problema y retornará a la pantalla inicial es decir al login?? 
Espero tu ayuda gracias.