I had a look and you are missing half the files for phpbb you will need to upload them. Also I see that all you databases are used, you'll need to delete one of them or upgrade your account.
i got phpbb but i mean like i get all these errors and i dont got a clue what im doin soo...one time it told me to change the chmod to like 444 or 644 or suttin....maybe that was on another thinga ma jig....