Sounds like java virtual machine problems. Here are some helpful links:

Subject	Forum	Poster	Posted on
Re: Java Chat/Enter your nickname box not displayed	Get Help	Dave	03/16/03 03:36 PM
Re: Chatroom won’t work	Get Help	Dave	02/24/03 04:39 PM
Re: Some people can’t get in.	Get Help	Dave	02/19/03 06:16 PM
Re: Ahh Bad Mastake Happend	Get Help	Dave	12/24/02 06:52 AM
Re: Room not working	Get Help	Dave	12/07/02 06:08 AM
Re: connection problems	Get Help	Dave	11/06/02 09:12 AM
Re: Java.net.Socket Exception	Get Help	Dave	11/04/02 06:02 PM
Re: Java.net.Socket Exception	Get Help	Dave	11/04/02 02:59 PM
Re: help getting into chat	Get Help	Dave	10/17/02 06:40 PM