Hi,
Do you want to fix something, it seems like it's working, or a new chat server and client.
I can fix it if you tell me the bugs, or I can make a new chat server and client for you. I can make users login, maybe a database to store users/passwords/other informations.
Please describe your requirements; what functions this chat should have. For exemple, do you want private rooms, if 2 users want a private chat?
What do you want besides a simple chat like the one in the archive?
Regards,
Tudor