Problem with Include function using Apache 2.0 and PHP 5 on W2K3 Server

I am new to PHP and Apache. I am trying to use the include function to include a file that has my web page header and menu, similar to what I used to do with SSI. The content of the include file doesn't display. Instead, I get a link that says function.main and below that I get a link that says function.include I can run other PHP code with no problem. The include files are in a folder below the doc root called Includes. This is running on Windows 2003 Server. I did a default install of Apache 2.0 and PHP 5. This is probably a settig in httpd.conf or php.ini but I can't seem to find it in the docs. Any help would be greatly appreciated. Thanks in advance, David