title: "Hello World" not work for rabbitmq
body: <p>I am new to rabbitmq, but for some (unknown) reason, the "hello
  world" program does not work for me.
  The send.py and receive.py are simply copied and pasted from the
  tutorial page:</p>
  
  <p><a href="http://www.rabbitmq.com/tutorials/tutorial-one-python.html" rel="noreferrer">http://www.rabbitmq.com/tutorials/tutorial-one-python.html</a></p>
  
  <p>rabbitmq is installed using "yum" on a RHEL 6. Python version is 2.6.
  I started the server using</p>
  
  <pre><code>$ service rabbitmq-server start
  </code></pre>
  
  <p>and it prints "SUCCESS".</p>
  
  <p>There is no error or warning messages by running send.py and
  receive.py:</p>
  
  <pre><code>$ python send.py
   [x] Sent 'Hello World!'
  
  $ python receive.py
   [*] Waiting for messages. To exit press CTRL+C
  </code></pre>
  
  <p>Then it never prints "Hello World!".</p>
  
  <p>What's wrong with it?</p>