You can find that thread here:
"I've been banned/suspended!"
If you want to find out what happened, you may email Disney requesting the Chat Logs. (toontown@disneyonline.com) They will reply back asking you some personal information, and then send you the chat logs. That's all they will tell you over the internet. Otherwise, you'll need to call them to get it unlocked. (1-888-332-1626)