error reporting

I'm running PHP 5.1 on IIS. My dev environment is all local on my machine. My php.ini has the following error reporting settings: error_reporting = E_ALL display_errors = Off display_startup_errors = Off log_errors = On log_errors_max_len = 1024 ignore_repeated_errors = Off ignore_repeated_source = Off report_memleaks = On track_errors = Off error_log = syslog To test, I've written a little script that divides by 0. When I run the script from the command line, I get entries in my Event Log as expected, but if I load the page into my browser (Firefox), no error is reported in the Event Log. I've checked http://www.php.net/manual/en/ref.errorfunc.php but can't find anything there. I figure I must be missing something pretty obvious but not sure what it is. The script and logged error from the command line are below. Thanks for any help. script: <html> <title><head></head></title> <body> <?php $a = 5; $b = 0; $c = $a / $b; echo $c; ?> </body> </html> logged error from command line: The description for Event ID ( 2 ) in Source ( PHP-5.1.2 ) cannot be found. The local computer may not have the necessary registry information or message DLL files to display messages from a remote computer. You may be able to use the /AUXSOURCE= flag to retrieve this description; see Help and Support for details. The following information is part of the event: php[2132], PHP Warning: Division by zero in C:\Inetpub\wwwroot\PHP\Testing\error.php on line 11. Regards, Bruce