How to enable my modules in Zend Framework

zendproject|
           |-> application
                          |-> models
                          |-> modules
                                     |-> person
                                               |->controllers
                                                              |-> PersonController.php

resources.frontController.moduleDirectory = APPLICATION_PATH "/modules"
resources.modules[] = ""

class Person_Bootstrap extends Zend_Application_Module_Bootstrap {
}

resources.modules[] =

$frontController = Zend_Controller_Front::getInstance();
$frontController->throwExceptions(true);
$frontController->returnResponse(true);
$frontController->setControllerDirectory(
            array(
                'default' => '/path/to/application/controllers',
                'person' => 'path/to/application/person/controllers'
            )
        );
$response = $frontController->dispatch();
$response->sendResponse();