OK, the login page looks fine, however, you changed the URL.
So if you use $defaultuser and $defaultpass to login this doesn't work?
Have you logged in already and changed the default password?
Usually there is a code that finds the webroot automatically. I usually leave this as it is and never had problems. don't know if this is the problem (shouldn't!), but you never know.
Save your current config.php and try it with this code for the rooturl:
$rooturl = "http://{$_SERVER['HTTP_HOST']}/limesurvey";