I am creating a custom form in Active Admin 0.5. I have registered a page and created a form through the DSL:

```
ActiveAdmin.register_page 'Planning', :namespace => :pos_admin do

  content :title => proc{ I18n.t("active_admin.dashboard") } do

    form do |f|
      f.input :type => :text
      f.input :type => :submit
    end

  end
end

```

The problem is that when submitting the form I get an empty Params hash. And the form tag contains no authenticity token. 

What am I doing wrong?