Hi,
Since you didn't post your configuration yet i can only guess, but most of the time this behaviour comes from:
- Not restarting apache.
- The lines to load the php5 module are still commented out.
The second can be fixed by running 'dpkg --reconfigure php5 libapache2-mod-php5' (Debian/Ubuntu only)
If that doesnt help look for lines like: 'LoadModule php5_module modules/libphp5.so' and 'AddType application/x-httpd-php .php' in your apache config and make sure they are not commented out. These lines should be in '/etc/apache2/modules.d/XX_mod_php5.conf'
If both don't work you should post your configuration
greetz,
Henry