I'm not totally familiar with how UBB HOSTING runs their DATABASES, but to help get you pointed in the right direction, much of that information can be found within -
includes/config.inc.php
The relevant information is -
'DATABASE_SERVER' => 'localhost',
'DATABASE_USER' => 'username',
'DATABASE_PASSWORD' => 'password',
'DATABASE_NAME' => 'yourforums',
Also, further down, around line 82 -
'FULL_URL' => 'http://domain.com/forums',
'BASE_URL' => '/forums',
'FULL_PATH' => '/server/path/to/your/public_html/domain/forums',
Post back if you get stuck. Cheers