Ob_Flush issue

Hello I have a sample code like: http://pastebin.ca/919386 I have around 4000 rows returned so it should show me partial output at client after each 100 rows but it never does. I am only getting the output after full completion. Though if you remove the step code and output after every row then i can see the update. My phpinfo(): http://craig.cs.uiowa.edu/smt/phpinfo.php Any idea what might be the problem? I want to show a status message after every 100 rows processed...... -- Ritesh http://www.riteshn.com