How to avoid compatibility issue of IE 11 with IIS7.5?

How to avoid compatibility issue of  IE 11 with IIS 7.5? IE 11 version is used in both servers(IIS 6 and IIS 7). We are using user controls as header and footer of website instead of master page. Using VS 2005 and Sql 2008.

In web.config we added this in and worked with IIS 6 and IE 11.


<configuration>
  <system.webserver>
    <httpprotocol>
      <customheaders>
        <clear />
       <add name="X-UA-Compatible" value="IE=EmulateIE7" />

      </customheaders>
    </httpprotocol>
  </system.webserver>
</configuration>


But in IIS 7 and with IE 11 compatibility issue is  there the above code in web.config isn't working.
 <add name="X-UA-Compatible" value="IE=11" /> 
The above isn't working for IIS 7.5 with IE version 11.