[PHP-INSTALL] problem executing scripts with IIS

I am using IIS with WinXP Pro and PHP 5.1.2. When I run a script with

[PHP-INSTALL] Problem installing PHP with system provided HTTP server

I don't have any problems installing PHP with my own custom installed apache HTTP server (I build it from the source and I am running 2.2.3 version) located in /usr/local/bin/apache2 but when I try to install it with the one that is system provided (it's 2.0.51) located at /usr/sbin/httpd it does n