I enabled the plugin "Membership Pro Registration Redirect" and set "show login form" to YES. When a user does log in they get redirected to the CB login page and it says "Session expired or cookies are not enabled in your browser. Please press "reload page" in your browser, and enable cookies in your browser. Please refresh/reload page before filling-in." But login with CB is possible without any problems. So why does it not work with the MSpro login?