title: qq Fileuploader always shows " Upload failed " in IE9
body: <p>I am a beginner in qqFileuploader. I use qq File uploader in my MVC3 application</p>
  
  <p>Uploader works fine in the Firefox and Chrome but it's always shows the " Failed " message</p>
  
  <p>in the IE 9. Please see my image</p>
  
  <p><img src="https://i.stack.imgur.com/MwPfZ.png" alt="enter image description here"></p>
  
  <p>I am clueless. Please help.</p>