title: IE9 CORS - xdomain: Timeout waiting on iframe socket
body: <p>I'm trying to do a CORS on ie9 using </p>
  
  <p>ie9proxy.html:</p>
  
  <pre><code>&lt;!DOCTYPE HTML&gt;
  &lt;script src="https://apiurl/Content/xdomain.min.js"&gt;&lt;/script&gt;
  </code></pre>
  
  <p>"xdomain: Timeout waiting on iframe socket" </p>
  
  <p>Hint: my ie9.proxy.html doesnt return the "X-Frame-Options" header</p>
  
  <pre><code>  &lt;!--[if lte IE 9]&gt;
      &lt;script src="https://apiurl/Content/xdomain.min.js"&gt;&lt;/script&gt;
      &lt;script&gt;
      xdomain.slaves({
       "https://apiurl": "/Content/ie9proxy.html"
      });
      &lt;/script&gt;
    &lt;![endif]--&gt;
  </code></pre>
  
  <p>What am I doing wrong?</p>