Forum Moderators: phranque
2 things must be there:
-- both names, example.com as well as www.example.com must be defined in the DNS,
-- and both names must then be defined in the http-server's config file.
It is up to your web hoster to do this properly.
If you send me a sticky mail with your domain name I could look at it and tell you if at least the DNS part is set up correctly.
Regards,
R.