php returning completely empty documents on new apache install

I just built the latest apache 2.0 and php5 (shared apache module) on a linux 2.6.5 box. After doing all of the setup from the INSTALL file, I'm unable to get a php hello world to work! (Well, I get it to work with the CLI, but not through my web browser) The apache server just returns a 0 byte document. No errors come out in the apache logs and it says the document was sent with a http 200 status. It is as if the php interpreter is not getting called. When the apache server starts up, it logs that php is in fact configured: [Sat Mar 11 16:06:51 2006] [notice] Apache/1.3.34 (Unix) PHP/5.1.2 configured -- resuming normal operations I believe I have the correct lines in my httpd.conf: LoadModule php5_module libexec/libphp5.so AddModule mod_php5.c DirectoryIndex index.html index.php AddType application/x-httpd-php .php .phtml AddType application/x-httpd-php-source .phps Does anybody have any suggestions for how I can dig into this further?