Authentication is no need!

hello, I am a wordpress chat plugin user.
I have a question.

I placed the chat into the post of my blog, and the chat on post shows the message of "You must be logged in to participate in chats", but I cant find the link of log-in out. And I want to open the chat every users without authentication, but if I uncheck all checkbox of Login options in admin area, it dosnt to be saved...

How can do it?
Please help me immediately.