Resque front-end doesn't load in Rails

Question

I've set up the Resque-web interface to work with my rails 3 app but it doesn't work in either development or production environments. My set up is as follows, and going to localhost:3000/resque just gives me the 404 page I've set up.

Routes.rb

mount Resque::Server.new, :at => "/resque"

Resque initializer

require 'resque'
require 'resque/server'

if Rails.env.development?
  uri = URI.parse(ENV["REDISTOGO_URL"])
  Resque.redis = Redis.new(:host => 'localhost', :port => '6379')
else
  uri = URI.parse(ENV["REDISTOGO_URL"])
  Resque.redis = Redis.new(:host => uri.host, :port => uri.port, :password => uri.password)
end

Dir["#{Rails.root.to_s}/app/jobs/*.rb"].each { |file| require file }
Resque::Server.class_eval do
  use Rack::Auth::Basic do |email, password|
    user = User.authenticate( 'foo@bar.co.za', 'password' )
    user && user.admin?
  end
end