How to redirect to previous page with message

In Module controllers/IndexController.php
Message:
Mage::getSingleton('core/session')->addSuccess('Query submit successfully');

Redirect
$this->_redirectReferer();

Redirect Fiex url:
boutiques is my module
$redirectUrl=Mage::getBaseUrl().'boutiques'; Mage::app()->getResponse()->setRedirect($redirectUrl);