NoMethodError in Controller#new
===

Hi everyone Im working in my app and I run into this error 

    NoMethodError in GasStationsController#new

    undefined method `gas_stations' for #<Class:0x12cf77510>
    Rails.root: /Users/Users/Documents/myapps/app1

    Application Trace | Framework Trace | Full Trace
    app/controllers/gas_stations_controller.rb:4:in `new' 

I dont understand if my routes are ok. I put my routes.rb and my GasStationsController

    Estaciones::Application.routes.draw do
        root :to => "static_pages#home"
        match '/contact', :to=>'static_pages#contact'
        match '/about', :to=>'static_pages#about'
        devise_for :users
        resources :users do
            resources :gas_stations
        end
        ....

    user_gas_stations GET    /users/:user_id/gas_stations(.:format)                       gas_stations#index
                          POST   /users/:user_id/gas_stations(.:format)                       gas_stations#create
     new_user_gas_station GET    /users/:user_id/gas_stations/new(.:format)                   gas_stations#new
    edit_user_gas_station GET    /users/:user_id/gas_stations/:id/edit(.:format)              gas_stations#edit
         user_gas_station GET    /users/:user_id/gas_stations/:id(.:format)                   gas_stations#show
                          PUT    /users/:user_id/gas_stations/:id(.:format)                   gas_stations#update
                          DELETE /users/:user_id/gas_stations/:id(.:format)                   gas_stations#destroy

as you see the method is there "gas_stations"


I only have this on my controller


    class GasStationsController < ApplicationController
         def new
    	  @user = User.find(params[:user_id])
    	  @gas_station = @user.gas_stations.build
         end
    end