My forum has been hacked.

[thekramershow]

Forum:

http://kramersforum.com/forum/index.php


My forum is for my radio show. It has a good size amount of people on it and it has thousands of unique visitors daily.

Last night one of my Mods texted me and said it had been hacked. It had some weird thing at the top, gloating that they'd hacked it and invited people to some chat room.

This morning the guy who runs our server sent me a message and said that they had reset the servers and that although some of the information would be lost, it would be back up by this morning.

Here is the message that appears there this morning as of right now:

Too bad you can't change it back, huh? Add me on skype, please! I am a lonely f*g! - aunstic

My tech guy says that vBulletin was hacked, not the servers.

How do I resolve this problem?