demilovato.co.cc currently maps to a
private address (192.168.42.55). If you ever want to map a domain name to an address, you can use
dig on Unices and
nslookup on MS OSes. You can also find web interfaces for these tools.
To make sure your site is up, access it via its x10 server name that you chose during account setup. If you can't remember what it is, go to
x10hosting.com, login with form at the top right (use your forum username & password), then look next to "Domain" in your account information table. You can check the status of the x10 servers
here, but keep in mind the stats might not be accurate. For one thing, the status page is generated at most once every 5 minutes, so might be up to 5 minutes out of date.
Where did you enter the domain name? There are all sorts of places you could type that information (notepad, for instance) and most of them would have no affect. Also, did you enter just "co.cc" or did you enter the name of your domain ("demilovato.co.cc")?
What you need to do (if you haven't already) is create an account with co.cc and register your domain. To configure the domain records, set the name servers for the domain to "ns1.x10hosting.com" and "ns2.x10hosting.com". Don't set up zone records or forwarding (those are alternate ways of setting up your domain and aren't compatible with the name server option).
Once the x10 name servers are responsible for your domain, log in to cPanel on your site (connect to port 2082; the url will be something like "http://demilovato.x10hosting.com:2082/"). You have two options: parked domains and addon domains. You probably want to create an addon domain; click "Addon Domain" in the "Domains" panel. Enter your .co.cc domain name ("demilovato.co.cc"). Use "/public_html" for the document root (unless you want demilovato.co.cc to be only part of your whole website). cPanel should automatically create an FTP username; just create the password. You only need the FTP user should you wish to let someone else access the demilovato.co.cc files. If demilovato.co.cc uses your site-wide document root (~/public_html), the FTP user will have access to the whole site.
With a parked domain, the domain will redirect to a directory on your main site (e.g. "http://demilovato.co.cc/" will redirect to "http://demilovato.x10hosting.com/foo/bar/", if demilovato.co.cc's document root were set to /public_html/foo/bar). With addon domains, the domain in the URL won't change.