Yep, like Seraphim said...you're pretty much screwed without a database backup, unfortunately. If your site is still up, even though you can't log into the admin panel, you can still log in to phpBB and download a backup that way.
Go to the Admin Panel (in phpBB), click on Maintenance, and then Backup, on the left side of the screen. You should then be able to restore it on a new forum.
Also, always, always, always make backups regularly. Things like this happen, even more with free hosts. You just never know these days.
Go to the Admin Panel (in phpBB), click on Maintenance, and then Backup, on the left side of the screen. You should then be able to restore it on a new forum.
Also, always, always, always make backups regularly. Things like this happen, even more with free hosts. You just never know these days.