There's not much you can do about that kind of message. It means that someone using your host or PREVIOUSLY using your host was banned, or they believe your client has been compromised. You might want to do a virus scan if you're not totally sure you're clean. Though no matter the outcome of the scan or who's to blame, you can't do much to reverse the ban except wait it out. You can *try* talking to dalnet admins, but you'll have to go to dalnet's site for that.
