[Solved] Hacked!

Your phpBB Version: 2.0.
phpBB Type: Standard phpBB
MODs: No
Your knowledge: Beginner
Board URL: http://www.twitchythumbs.co.uk/integra
PHP Version:
MySQL Version:
What was done before the problem appeared?
Nothing
What was done to try to solve the problem?
renamed "index.php" in my root. Uploads "auth.php" from the integra download, to the /integra folder.
De.scription and Message
Help!
I've been hacked, somehow.
I've no further information, can anyone help please?
I'm a complete and utter newbie with things like this, so please be gentle with me, and put any instructions into the same language as you'd use for a 5 year-old.
Thanks!
phpBB Type: Standard phpBB
MODs: No
Your knowledge: Beginner
Board URL: http://www.twitchythumbs.co.uk/integra
PHP Version:
MySQL Version:
What was done before the problem appeared?
Nothing
What was done to try to solve the problem?
renamed "index.php" in my root. Uploads "auth.php" from the integra download, to the /integra folder.
De.scription and Message
Help!
I've been hacked, somehow.
I've no further information, can anyone help please?
I'm a complete and utter newbie with things like this, so please be gentle with me, and put any instructions into the same language as you'd use for a 5 year-old.
Thanks!