The error here is:
SQL Error: Table 'dreambox.ubbt_CATEGORIES' doesn't exist
SQL Error #: 1146
Query: select CATEGORY_ID,CATEGORY_TITLE from ubbt_CATEGORIES order by CATEGORY_SORT_ORDER
This table doesn't exist, the prefix is ubbt_ and not dreambox.ubbt_
Im my config files there's nothing to find like dreambox...
I must say, there's a database existing on my server named dreambox, but no config points to that one...
dreambox.ubbt_CATEGORIES is the databasename.tablename. It's just the way PHP is generating the error. It's basically saying that the ubbt_CATEGORIES table doesn't exist in the dreambox database.
For some reason it's looking in the dreambox database. At what point does this error come up? Can you check your includes/config.inc.php to see what it has for the database information?