title: httplistener.Start() returns Access is denied
body: <p>I have IIS7 running on Window 2008 R2 server.<br>
  I have an MVC asp.net web app which I spawn an http listener from that web app and I keep getting</p>
  
  <pre><code>2015-07-30 11:25:12,306 [ERROR] [Integration.Orchestra.EventSources.HttpPostStringServer] Failed to start Http Post Listener. System.Net.HttpListenerException (0x80004005): Access is denied
  at System.Net.HttpListener.AddAllPrefixes()
  at System.Net.HttpListener.Start()
  </code></pre>
  
  <p>I use localhost as host name and 999 as port.
  I have search around the web and I tried to run the following command :</p>
  
  <blockquote>
    <p>netsh http add urlacl url="http://*:999/Context" user=everyone listen=yes</p>
  </blockquote>
  
  <p>Any idea of what may cause this? I log in as administrator, I even tried to run the above command by setting user=MYDOMAIN\administrator</p>