How to eliminate renderblocking of webresources.asd

Question

Hey guyz please tell me how to remover render blocking of webresource.axd i have a code but its not working for me code given below

  I downloaded the script compressor.cs and put it inside app_code Folder

<system.web>

<httpModules>

<add type="ScriptCompressorModule" name="ScriptCompressorModule" />

</httpModules>

<httpHandlers>

<add verb="*" path="*js.axd" type="ScriptCompressorHandler" />

</httpHandlers>

</system.web>