I have the same problem the guy had here: http://forum.dragon-community.net/index.php/topic,281770.0.html
But the difference is I can't solve it.
I can log in, but when I choose server it automatically disconnects me. So I tried full check, but always when I make it I click start and I'm getting message "Files are corrupted!!! Please full check." So I make full check, but it doesn't help. The same problem again and again and again...all the time. What should I do? I'm soo scared ;c
Delete your system folder, then do fullcheck.
It worked. Thanks ;)