Gzip Compression Not getting not enable

Question

i want improve my site speed when i m checking speed for google page speed test its showing me about to enable gzip compression but when i m using code given below to enable gzip compression its still showing me the same error whats the solution please tell me its urgent

 

<system.webServer>

<httpCompression directory="%SystemDrive%\inetpub\

temp\IIS Temporary Compressed Files">

<scheme name="gzip" dll="%Windir%\system32\inetsrv\gzip.dll"/>

<dynamicTypes>

<add mimeType="text/*" enabled="true"/>

<add mimeType="message/*" enabled="true"/>

<add mimeType="application/javascript" enabled="true"/>

<add mimeType="*/*" enabled="false"/>

</dynamicTypes>

<staticTypes>

<add mimeType="text/*" enabled="true"/>

<add mimeType="message/*" enabled="true"/>

<add mimeType="application/javascript" enabled="true"/>

<add mimeType="*/*" enabled="false"/>

</staticTypes>

</httpCompression>

<urlCompression doStaticCompression="true" doDynamicCompression="true"/>

</system.webServer>