title: WCF ServiceHost basicHttpBinding 503 error
body: <p>I'm trying to run a WCF ServiceHost as an NT Service on a Windows 2007 SP1 Server.  The ServiceHost is reponsible for hosting a single service endpoint:  a basicHttpBinding with the following address:</p>
  
  <pre><code>http://localhost:5555/ToBlah
  </code></pre>
  
  <p>When I run this ServiceHost on my local machine (Windows XP), it works fine - when I POST a SOAP message to it, I get back an HTTP 202 code ("Accepted"), which is the correct response for my service because the contract has IsOneWay=true.  However, when I run this on my 2007 server, I get 503 errors when I try to call the service.  I have the WCF message logging turned "all the way up," but I'm not seeing any logging whatsoever, which leads me to believe that this is happening at a lower level than WCF (the call never gets to the WCF "layer").</p>
  
  <p>The sys-admins and I have tried various forms of httpcfg commands, but no luck so far.</p>
  
  <p>I know trying to host this in IIS might be a possible solution, but our production app server does not have IIS installed, so I would like to just run the service as a ServiceHost.</p>
  
  <p>Any ideas would be greatly appreciated!</p>