65254 mod_gzip install

i have fedora core installed and something is causing my server to munch bandwidth excessively. This is unusual as my server is a lot less busy than it used to be, so i want to install mod_gzip to my server so that we have better compression and hopefully improved bw savings. i have had a go at installing it myself but the verification site [login to view URL] tells me the site is not gzipped. i think maybe i pasted the bit of code from [login to view URL] slightly in the wrong place.