Dude! I figured it out!
My php file was using the "<%...%>" ASP tags, and the php.ini file was by default not allowing the ASP-style tags to be processed...only the PHP tags of "<?...?>" were enabled. So, after enabling the <%...%> tags, the php code started executing.
Also of note...
Once I got the php code working, my next problem was that the mail() function wasn't working with sendmail. Solution: by default, the php.ini file was not looking for sendmail, so I rem'd out the sendmail_path line, added the correct info, and now the mail() function works!
Anyhow, thanks for the help!
mack