For best results when talking to Anna, use correct spelling and grammar, enter only one sentence at a time, and don't use a lot of internet slang.
jpp, You post that this ichato is an intelligent and hilarious chat bot.
It's level of ability or implied "intelligence" seems somewhat vague or non-existent at this time, at least to me.
You are attempting to enter a private internet forum.
Entrance to this private establishment requires membership but not an account.
Loebner Prize is an annual contest to see who can create the most human-like "chatbot" program.
This year's winner, Suzette, actually managed to fool a judge into thinking it was human! The Loebner Prize competition is divided into multiple rounds where a judge asks questions of both the chatbot program and a human subject chatting via IM.