Is there some known issue updating firmware on the S5?

I'm trying to get any of the 3 2015 ones at bitmain to install but it seems the S5 stops responding to the upload command.

Firefox times out after hitting OK to upload, IE also times out waiting for a reply back, Chrome seems to start the upload but sits at 0% and times out.
  So it seems to me the S5 is not answering back the initial upload command.
there are no network issues, I have tried it from a few different pc's and one plugged into the same switch.