search for: find_with_case

Hi, I''m beginner in rails, and I wanted to add to my simple application Authlogic. So I''ve watched http://railscasts.com/episodes/160-authlogic and step-by-step done everything. And almost everything works fine, except login in. After registration new user is automatically logged in, he can edit his profile, but after clicking logout and trying to login again I get error