Server 500 Error....

Hi. A few weeks ago, I got PHP Nuke to install beautifully on my XP machine at home to test it - no problems for a first time user. Now, I want to use it for my work web site on my remote server for the company I work for. I am running Windows 2000 Server edition on a nice fast box with IIS 4. I installed PHP, MySQL, and PHPNuke. Only, I can't open any PHP pages: I get an "Internal Server Error 500" every time I try to open a php page through the browser by hitting the site. Everything works fine and running php.exe -i outputs the HTML code just beautifully. I checked out all I could on this error and did the required things, making sure that the php.exe and the .dll file is all accessible to anonymous users (IEUSR_<computer> or whatever it is...can't remember off of the top of my head). But still, it doesn't work. Can anyone please help me out with this? I really need to set something up very quickly and I would love to use PHPNuke. :) Thanks, Nat. nat@harari.org http://www.somethingwonderful.com