Passwords are unique to each machine not to the application. For example if I were to load your application onto my machine, my security settings would be in place. I have never had Lookout ask for a password when accessing through a web browser. Does the machine you are using have Lookout on it also? If it does, you need to use the user names and passwords for that machine. If not,try using user name "administrator and no password.
Hope this helps,
Carl