title: .ashx image handler not working on production server
body: <p>I developed a little .ashx handler that returns an image so I could do</p>
  
  <pre><code>&lt;img src="myhandler.ashx?query=string"&gt;
  </code></pre>
  
  <p>It worked perfectly on my dev machine.  I moved it to the production server (IIS on Server 2008) and it broke.  By "broke", I mean it no longer returns a valid image.  The handler calls an external application to generate the image - I had the path wrong, fixed it, and all that accomplished was to make the warnings stop showing up in the event log.</p>
  
  <p>I know it has permission to run the program. I manually ran the command I'm passing it and successfully generated an image.  There are no errors in the event log and the IIS log says it responds with a 200/OK.  I'm a little lost as to how I should go about debugging this further.</p>