Topic: Comet.php not flushing

I am using the latest comet download (xajax 0.5 SVN), but the sample comet.php does not flush. I only get to see the final result of 10% and not the incrementing values. I tried using Firefox ( and IE 6/7 and the problem persists.

It is a server side issue and I am using Apache 2.2.x and PHP 5.1.5. Please help.