problem reading php in browser

I just installed PHP4 on my server. Now when my browser views a file ending in .php, .php3, .php4, .phps the browser rather than displaying the file wants to download the file. It will however display a .phtml file. If the file is index.phtml it only gets displayed if it is referenced on the URL line. (www.xxx.xxx/index.phtml). I assume that the problem is with one of my configuration files, httpd.conf or php.ini. What might I look for or try? In the http.conf file I have configured: LoadModule php4_module /usr/lib/apache/libphp4.so AddModule mod_php4.c DirectoryIndex index.php index.phtml .... <IfModule mod_php4.c> AddIcon /icons/php4.gif .php3 .php4 .php .phtml </IfModule> <IfModule mod_php4.c> AddIcon /icons/phps.gif .phps </IfModule> <IfModule mod_php4.c> AddType application/x-httpd-php .php .php3 .phtml AddType application/x-httpd-php-source .phps </IfModule> Note that when the browser tries to download the file it says: application/x-httpd-php3 thanks, Avram