I am using devise and recently added active admin, which created a separate table of admin_users to keep admins.
All works fine with Active Admin when I try to log i
both of the corey and Sooie are right... but only partially, to stop your blanket authorize_user! filter from affecting active_admin you need to implement both of their answers...
config/initializers/active_admin.rb
config.skip_before_filter :authorize_user!
app/admin/dashboard.rb
controller do
skip_before_filter :authorize_user!
end