routing error for a nested controller and rspec

Hello, I am getting a strange error when using rspec with nested routes

it 'succeeds' do           get :index, @parameters           response.should be_success end ...

Failure/Error: get :index, @parameters      ActionController::RoutingError:        No route matches {:website=>#<Website id: 1, name: "Website1", base_url: "http://somewebsite1.net", created_at: "2011-02-09 18:57:31", updated_at: "2011-02-09 18:57:31">, :controller=>"website_users"}

my routes.rb

... resources :websites     resources :users, :controller => 'website_users' end

rake routes ... website_users GET /websites/:website_id/ users(.:format) {:action=>"index", :controller=>"website_users"}                          POST /websites/:website_id/ users(.:format) {:action=>"create", :controller=>"website_users"}         new_website_user GET /websites/:website_id/users/ new(.:format) {:action=>"new", :controller=>"website_users"}        edit_website_user GET /websites/:website_id/users/:id/ edit(.:format) {:action=>"edit", :controller=>"website_users"}             website_user GET /websites/:website_id/ users/:id(.:format) {:action=>"show", :controller=>"website_users"}                          PUT /websites/:website_id/ users/:id(.:format) {:action=>"update", :controller=>"website_users"}                          DELETE /websites/:website_id/ users/:id(.:format) {:action=>"destroy", :controller=>"website_users"} ..