Rails3 I18n locale in urls

As per the Rails 3 I18N documentation, I wrote in my routes.rb

scope “(/:locale)”, :locale => /en|nl/ do
resources :users
end
match ‘/:locale’ => ‘home#index’
root :to => “home#index”

and in my ApplicationController.rb
before_filter :set_locale
def set_locale
I18n.locale = params[:locale]
end
def self.default_url_options(options={})
{:locale => I18n.locale}
end

but I sill get urls with the locale parameter as if the scope was
ignored …

http://localhost:3000/users/sign_in?locale=en

I rather should get : http://localhost:3000/en/users/sign_in

( I am using also Devise 1.2…)

what could be wrong ? thanks for your suggestions

the clue was in my question … I am using Devise … so I should
scope the devise for :

scope “(:locale)”, :locale => /en|nl/ do
devise_for :users …
end