The 'Bad Username' error message is not the same as a D-line. The error message is received by many people all the time, no worries

- Might want to look at
this thread.
However, from
this page:
"INVALID USERNAME
Closing Link: 0.0.0.0 (Invalid username [ ]) Disconnected
This means the IRC server did not accept the username (User ID) settings in the Ident service (Identd) in mIRC under File/Options/Connect/Identd/. In the error message it shows the part it did not like between the [ ] brackets. Most probably you use characters in your File/Options/Connect/Identd/User ID settings that the server doesn't like. Make sure you remove all strange characters from your User ID. Remove dots, spaces, and all other non-alphabetical characters."Hope this helps

Regards,