Add this bundle (and its dependencies, if they are not already there) to your application's kernel:
// app/AppKernel.php
public function registerBundles()
{
return array(
// ...
new JMS\AopBundle\JMSAopBundle(),
new JMS\SerializerBundle\JMSSerializerBundle(),
new JMS\SecurityExtraBundle\JMSSecurityExtraBundle(),
new Knp\Bundle\MenuBundle\KnpMenuBundle(),
new Lexik\Bundle\FormFilterBundle\LexikFormFilterBundle(),
new Illarra\CoreBundle\IllarraCoreBundle(),
// ...
);
}