web.config issues? Gzip no working properly

Question

I read about everything that i could find at the web for gzip compression of iis

<?xml version="1.0" encoding="UTF-8"?>

I am aware that the first time gzip won't work in order to create the compressed files... this is the awkward part... i use gtmetrix to see what i can do in order to load faster my webpage... Although the code is correct sometimes for no reason gzip isn't working, according to gmetrix report.. i also use fiddler that also points out the same more or less... does anyone have any idea what might going wrong? Thank You! the server is running iis7.6

Answer 1

dynamiccontent in iis roles was missing, once I added that it solved the problem.