Install PHP on PWS (or else)

Hi, I have just started learning PHP within the last 48 hours. I didn't know what was required to run and write PHP, so I downloaded the PHP installer (I already have PWS). I installed PHP, and set it up as they said in the install.txt, but when i try to run a PHP file, it gives me "Error 403.1" 'No access to executable programs' or something like that. (I know it's error 403.1, but I have a danish version of PWS, so the error was on Danish, therefore i do not know if the translation is correct). Can anyone help me? It doesn't necesarely have to be a suggestion on how to solve this problem, but can also be instructions on how to install PHP (from the beginning. I do not care if that means that i have to uninstall something). I use windows 98, so if anyone who got a perfectly installed and running version PHP on Win 98, please tell me how you installed! I'd be very happy!!! Regards Mathias PS: I use Windows 98, PHP 4.2.1 and PWS