html - Rails application using bootstrap on IE9 looks fine locally but not on the server -

on local machine, can see rails application fine. when deploy server, looks did not pick css. fonts not correct, bootstrap left navbar not displaying correctly.

i figured issue ie why working okay on local server on ie? have researched , have tried recommendations of placing

<meta http-equiv="x-ua-compatible" content="ie=edge" />   

in layouts/application.rb. attempted inject header updating config/application.rb file

config.action_dispatch.default_headers.merge!('x-ua-compatible' => 'ie=edge')

i went , checked , saw there on ie. no luck. still not display css on server works fine locally.

i using

rails 4.2.1,

bootstrap-sass 3.3.5,

issues on ie7, ie8 , ie9 fine on ie10 , ie11.

on ie7 - ie9 okay on local not when deployed server.