PHP doesn't work on Redhat 7.2

Here's the deal... I've downloaded Redhat 7.2, created two CDs and installed it. I installed it with Apache and all the PHP modules. I found out that Apache didn't run autmoatically after booting, so I changed that. Apache now runs fine. However, when I request a PHP file, I get the contents of the PHP file, without it being executed by the server. When I open the Apache Config tool, I see index.php set as the default page, so why isn't any .php file being executed? I tried chmodding so it has execute rights... nothing. My files are in the root webdir (index.html loads fine over HTTP), so it should work. Anybody have clue what I have to do? Thanks. /Michiel