Error 404 squirrelmail-1.4.22

Question

I am new to squirrelmail. I am trying to configure a mail server on a linux machine which I installed apache, php, and dovecot.

I installed squirrelmail from the source code in /var/www/webmail/

I configured a virtual host:

<VirtualHost *:80>
  ServerName webmail.my.domain.com
  ServerAlias webmail
  DocumentRoot /var/www/webmail
  <Directory "/var/www/webmail">
    Order allow,deny
    Allow from all
  </Directory>
</VirtualHost>

I set the Domain under "Server Settings" in the config file to webmail.my.domain.com.

when I try to do a configtest.php in browser: webmail.my.domain.com/src/configtest.php

I get this error: 404 Not Found The requested URL /src/configtest.php was not found on this server.

I am not sure how to get past this error. Any help would be appreciated.

Thanks.