CQ5 login authenticator pid not working in https

We have customized cq5 login component, so that we can use in one of our web site page and also using login authenticator pid for handling invalid credentials.Now if login component is put in web page that is configured in http, everything works fine and we are redirected to secure section(i.e. https) and also, login authenticator pid is working correctly. But , if we move our login page(i.e. page in which login component is there), it is not working for invalid credentials for valid credentials, it is correctly going to secure connection. So, could you tell me know the solution, why login authenticator is not working fine when we move login page to https?