ob_gzhandler doesn't seem to be working

I thought I would try out the ability to GZip my PHP pages, so that they would be sent quicker and use less of my bandwidth :) Anyway I have found the following tutorials and information on this: http://www.zend.com/zend/art/buffering.php http://www.php.net/manual/en/function.ob-gzhandler.php http://www.phpbuilder.com/columns/piergiorgio20010321.php3?page=3 Unfortually I have been unable to get any of my pages to actually GZip up during transmittion. I have enabled output_buffering = On output_handler = ob_gzhandler in the php.ini file, with no luck I have tried php_flag output_buffering on php_value output_handler ob_gzhandler in .htaccess files I have even tried ob_start("ob_gzhandler"); at the top of my PHP Files.. Unfortually the output is NOT GZips, I have been testing the output with this script: http://leknor.com/code/gziped.php or by manually sending a HTTP Request: GET /whatever.php HTTP/1.0 Host: localhost Accept-Encoding: gzip Nothing I try gets the page GZipped. I am using php 4.0.6 binaries on windowsXP with apache 1.3.20 If anyone has been able to get this working, or has a solution to my problem please contact me, Thanks Andrew