Hi thanks for your comments, I'm using the Wordpress setup files, that sets up the wp_config.php for me. But when I complete the process, wp_config.php can't find the database that IS there.

"username"_username & "username_database, I presume you mean, the prefix that the server has assigned me.... Yes I am. I'm doing everything correctly - from what I can see anyway.

My prefix is 'releaset' so my database name could be "database" or "123456789", but I will always have to input it as releaset_database or releaset_123456789