As Auvee said you need to create a database or you can use an existing database..
Go to your cpanel then go to sql database either create or use an existing database... now if you the password of the database what i do is i create new user for database x.
A simple example:- Please use the correct database name, password and whatever..
Database Name: someone_chat
Database User: someone_chat
Database Password: xxxxxxx
Database Host: localhost
Table Prefix:
I hope the above info helps you... PM the staff or me for assistance...
*4*
PS. leave localhost as localhost... Table Prefix could be a table to use not sure!!!