how to gzip svg image in IIS 8 windows8

To keep in simple i created svgtest folder with a simple html page and an svg image which calls svg image<img src="MysvgImage.svg">

i placed the folder in default website location C:\inetpub\wwwroot and was able to browser to the html page.

I also edited the applicationHost.config file in C:\Windows\System32\inetsrv\config with <add mimeType="image/svg+xml" enabled="true" /> 

then i restarted the IIS. when i loaded the image it did not compress the image. is there any other setting i need to do?

thanks