adding Hint to query

[hattingen]

Hi,
I am trying to add a hint to the querybuilder to search in translatable fields.
So far I have:

		$qb->getQuery()->setHint(
			\Doctrine\ORM\Query::HINT_CUSTOM_OUTPUT_WALKER,
			'Gedmo\\Translatable\\Query\\TreeWalker\\TranslationWalker'
		);

        $table->setAdapter($this->getDbAdapter())
            ->setSource($qb)
            ->setParamAdapter($this->getRequest()->getPost())
        ;

It is ignored.

Where would be the best way to implement this?