No working link to network files
I think the trouble comes from your browser. See the answer from this question :
How can I create a link to a local file on a locally-run web page?


  Some browsers, like modern versions of Chrome, will even refuse to
  cross from the http protocol to the file protocol, so you'd better
  make sure you open this locally using the file protocol if you want to
  do this stuff at all.


Maybe another approach is to make a script witch will get the file from the server side and send it to the client in streaming.