using the PHP4 mail() function in (Newbie)

Any advice on this would be much appreciated: I am trying to send a simple email. in the php file, i have entered: <?php mail ("myemail@address.com", "This is the Subject", "This is the message body"); ?> when i load the page, i get the following: Warning: Server Error in C:\inetpub\wwwroot/php/tests/test.php on line 2 test.php being the file containing the PHP mail code this is the sendmail info in my php.ini file: [mail function] ; For Win32 only. SMTP = localhost ; for Win32 only ; For Win32 only. sendmail_from = me@localhost.com ; for Win32 only thanks, pete