title: RabbitMQ dead letter exchange never getting messages
body: <p>I'm trying to setup my first RabbitMQ dead letter exchange, here are the steps I'm using through the web admin interface:</p>
  
  <ol>
  <li>Create new DIRECT exchange with the name "dead.letter.test"</li>
  <li>Create new queue "dead.letter.queue"</li>
  <li>Bind "dead.letter.queue" to "dead.letter.test"</li>
  <li>Create new queue "test1" with the dead letter exchange set to "dead.letter.test"</li>
  <li>Send a message into "test1"</li>
  <li>Nack (with requeue = false) the message in "test1"</li>
  </ol>
  
  <p>I am expecting that these steps should put a record into the "dead.letter.queue" through the "dead.letter.test" exchange.  This is not happening.  </p>
  
  <p>I can manually put a message into the "dead.letter.test" exchange and it shows up in "dead.letter.queue" so I know that is fine.</p>
  
  <p>When I look at the admin UI it shows that the DLX parameter is setup on the queue "test1".</p>
  
  <p>Where am I going wrong?</p>