ActionView::Template::Error cannot connect to active admin? the

[visumdesignz]

I am having a hard time connecting to active admin I get stuck @ localhost:3000/admin of the this tut http://net.tutsplus.com/tutorials/ruby/create-beautiful-administration-interfaces-with-active-admin/ I can connect to localhost:3000/ but when I connect to localhost:3000/admin I get page errors where there is supposed to be a user login...

Started GET "/admin" for 127.0.0.1 at 2012-04-21 20:48:24 -0500
Processing by Admin::DashboardController#index as HTML
Completed 401 Unauthorized in 2ms


Started GET "/admin/login" for 127.0.0.1 at 2012-04-21 20:48:25 -0500
Processing by ActiveAdmin::Devise::SessionsController#new as HTML
  Rendered c:/RailsInstaller/Ruby1.9.3/lib/ruby/gems/1.9.1/gems/activeadmin-0.4.3/app/views/active_admin/devise/se
ssions/new.html.erb within layouts/active_admin_logged_out (693.0ms)
Completed 500 Internal Server Error in 851ms

ActionView::Template::Error (super: no superclass method `buttons' for #<ActiveAdmin::FormBuilder:0x2225658>):
    8:       f.input :password
    9:       f.input :remember_me, :as => :boolean, :if =>  false  #devise_mapping.rememberable? }
    10:     end
    11:     f.buttons do
    12:       f.commit_button "Login"
    13:     end
    14:   end

I really would like to get this step out of they way! haha hope someone knows an easy fix :)