I'm getting this same message logging into a different server.
"
* Connecting to irc.hashmark.net (6667)
-
-irc.hashmark.net- *** Looking up your hostname
-
-irc.hashmark.net- *** Found your hostname, cached
-
-irc.hashmark.net- *** Checking Ident
-
-irc.hashmark.net- *** No ident response
-
Ping? Pong!
-
Your username is invalid.
Connect with your real username, in lowercase.
If your mail address were
foo@bar.com, your username would be foo.
-
Closing Link: deraith by irc.disorient.net (USER: Bad username)
"
I tried to change my username to fit, but it still didn't work. Any thoughts would be appreciated.