Help! Apache doesn't recognize my php files!!!!

Hi. I have installed the PHP4 and I did the "make" and "make install" to Apache after the "configure --activate-module=src/modules/php4/libphp4.a", and it seems that all was right but when I try to see the php test page the apache server manage the file as a data file and ask for Opening or Saving to disk. I have uncommented the "AddType" lines for php4 in httpd.conf and restarted the server with "apachectl stop" and "apachectl start". I also configured properly the php.ini file. I don't know what is going wrong! Can anyone help me please? Thanks.