title: Cannot load "ie" it is not registered
body: <p>OK, this question is similar to the one posed here:  <a href="https://stackoverflow.com/questions/19764243/can-not-load-ie-it-is-not-registered-error-message-on-karma">Can not load &quot;IE&quot;, it is not registered! error message on Karma</a></p>
  
  <p>Except I suspect that user has a problem with differentiating between 32bit and 64bit explorer.  My issue is for 32 bit Explorer running in WinXP.</p>
  
  <p>When I launch karma I get the message "Cannot load IE it is not registered.  Perhaps you are missing some plugin?"   Prior to this, I had installed the ie launcher as well as the Firefox one.  The Firefox one <em>does</em> work.</p>
  
  <p>Here are the steps I followed to try and get it to launch:</p>
  
  <p><strong>1)</strong>  <code>npm install karma-ie-launcher --save-dev</code></p>
  
  <p>no go</p>
  
  <p><strong>2)</strong>  then I noticed <code>package.json</code> for Karma did not have the entries for ie.   So I added them to </p>
  
  <p>devDependencies and, for good measure, peer dependencies</p>
  
  <p>no go</p>
  
  <p><strong>3)</strong>  then I ran <code>karma start --log-level debug</code>   to verify the ie plugin was recognized and loaded.  It was.</p>
  
  <p><strong>4)</strong> in desperation tried overwriting the <code>index.js</code> for ie-launcher with the patch from here: <a href="https://github.com/christophercurrie/karma-ie-launcher/blob/64bit/index.js" rel="nofollow noreferrer">https://github.com/christophercurrie/karma-ie-launcher/blob/64bit/index.js</a>  </p>
  
  <p>no go  (though I didn't really expect it to make a difference).</p>
  
  <p>For reference, my IE_BIN is pointing to  <code>C:\Program Files\Internet Explorer\iexplore.exe</code></p>
  
  <p><strong>UPDATE:</strong>  By manually -- in the karma.config file -- adding a plugin section and entry for IE (as suggested below) I can now get karma to attempt to launch IE.  It tries 3x and each time a browser window is opened but karma reports "Cannnot launch IE" and none of the tests get executed.   </p>
  
  <p>Oddly if I click on the <code>debug</code> button it appears to try and load the tests within IE (I can see HTML from my test fixture appear) but Karma does not report anything.</p>