404 Error Pages Don't Work for Me

[eluser]Burak Erdem[/eluser]
OK, now I see there is a problem. I just did what you said, devbro. I used the following code to generate a native PHP error;

Code:

<?php
header("HTTP/1.0 404 Not Found");
exit;
?>

It's still the same. Endless loop in Google Chrome and default error page in Firefox. Well, I don't understand what the problem is and I don't know what to do now

I'm on a Windows Vista machine and I use Zend Server CE to develop my application. Is there an option in php.ini or httpd.conf that prevent to produce errors?