title: Virtualenv "workon" command online working in one terminal tab.
body: <p>I'm working on a django project.</p>
  
  <p>I hav virtualenv and virtualenvwrapper setup.  When I invoke </p>
  
  <pre><code>workon myprojectname
  </code></pre>
  
  <p>I cannot invoke it again in another terminal tab or window.  Any ideas why?
  Does it have anything to do with postactivate hooks? I wouldn't think so.</p>
  
  <p>Thanks for the help.</p>