Log errors to file (PHP + IIS6 + FastCGI + Win2003 Server)

Though I have read lots of posts and pages concerning the issue (shown below), I guess I'm missing something here. The mais issue is: my PHP errors are not being logged to the file specified nor to the system event log.

My phpinfo() shows: Windows Server 2003, PHP 5.3.6, log_errors = On, error_log = C:\\errorphp.log

I have tried both error_log = C:\Inetpub\logs\php.log and error_log = syslog in php.ini to no effect (either one at a time).

I have:

1. restarted IIS after every php.ini change
2. granted the IUSR_XXXXX User Modify permissions on the folder AND the file
3. tried leaving the directory blank and letting PHP create the file
4. had a headache.

Any help is much appreciated.

references:

• PHP Manual - PHP on IIS 6
• Store PHP errors in a log file
• IIS PHP doesn't log errors to log file
• My php error log file is empty
• Running a defect php file cause error 500
• Logging PHP to Windows Event Log