Probably you have followed some instructions from several articles to activate IIS compression for binary messages and you’ve been totally unsuccessful. Maybe they told you to put some additional nodes into your web.config or go to C:\Windows\System32\inetsrv\Config and edit applicationHost.config file adding some custom nodes under httpCompression node.
Well, if that’s your case, then you may try this:
1- Open your IIS
2- Select the Server on the left menu.