Hi,
You have to go to your "cPanel >Addon Domain" and configure your new
Domain name. Once you have done that your urls will look like
My signature at the bottom of this thread.
www.bumiweb.com is my main domain and
www.siapamoyanganda.com/ is my addon domain.
You should go to this forum and you will find your answer in the archives:
http://www.vodahost.com/vodatalk/domain-names-dns.html