When you are installing scripts or web-based applications, the MySQL settings need to be entered in a certain format.
For example, if you set up a database called 'dbase' in cPanel, the full database and user names will have your cPanel account name prefixed in front of them, separated by an underscore:
Database server: localhost (or domain.com.au for remote use)
Database name: account_dbase
Datbase user: account_dbusername
Password: password you set in cPanel