.co .cc is a registrar, Not a hosting company, who are you hosting it with?
Registrars have no say over external access, it is handled by your host, local or dedicated server.
So, we can resolve the issue. Kevin is your best bet for getting direct database help, I can help you server side (web host side)
So let's try and get this resolved.
So , Who are you using for host.
Did you create the database with your host?
If so, are you sure the database was created?
What did you use to create the database on the host?
If it was a database wizard, did you grant all privileges?
If it was a database, did you create a separate user and grant it full access?
Are you sure you added the user to the database?
Is the password 100% correct? (as in case sensitive)?
Are you using a Linux Host or a Windows Host
Answer these questions so we can determine the issue.