Windows 8.1 IE hosted application config file and web service communication issue

I have IE hosted window form application which works absolutely fine on all environments exceptWindows 8.1 and IE 11. Here web service communication fails. Web service proxy class constructor never returns.

I have added link tag to download dependencies.

If I remove config file link from my aspx, web service communication works. This is weird, but this happens.

I need .config file to download dependencies as my web server is behind BigIP(load balancer), I cannot remove .config link. If .config tag removed IE fails to download dependencies(404 error in network profiler).

Any guesses, why .config link tag blocking(Only on Windows 8.1 and IE11) web service communication.

Or is there any other way to download dependencies without using .config link tag.

Note: I have .net framework 4.5 installed on server. Also caspol entries are done and site is added under trusted sites.