Dynamic content compression does not work with IE9

I have an api page written with c# and it provides json output for my angular JS front-end page.

I recently turned on dynamic content compression on IIS7 to reduce the amount of data needs to be transferred to browser and to increase speed of api.

The angular page still work with with modern browsers, but IE9 does not work.

I tried to add Content-Encoding:gzip header manually into my api page but then it does not work with any browsers.

Any suggestions?