PHP - IIS - MySQL issues

Hi,
I'm having significant issues getting php on IIS 6 to work correctly. I have MySQL up and running correctly and PHP installed and working correctly. I am able to bring up php pages and I can get a phpinfo().

My problem comes when I attempt to add the MySQL.dll module or the mysqli.dll module. The IIS instance just hangs. In fact it hangs all websites on the server until I restart IIS.

I have PHP 5.0.3 installed. I am able to load other modules such as imap and still get the phpinfo(). The instant I add MySQL... blam.

I'm interested in any ideas anyone might have.
Thanks
Chris

Ok... so I figured out some of my problems. The issue was an inability of PHP to find the libmysql.dll file. Despite what I have seen on a number of postings, the libmysql.dll file must be located in the c:/windows directory. Simply putting the files location in the PATH system variable has no effect. Nothing I did seemed to allow it to be found. In addition, no errors are given in either the PHP error log or the event log even with ALL logging turned on.

Does anyone have any idea why this would be happening? I would really like to be able to remove this dll from the windows directory for easy of upgrade.

In addition, it would appear that the PHPRC system variable also has no effect. I have had to place the php.ini file in the windows directory as well.

thanks,
Chris