issues finding public folder when requiring sinatra/base

I have found that in my Sinatra app, when I require 'sinatra', I can access my public folder as expected, but when I require 'sinatra/base' I can't. Here is my relevant code (which works until I change to /base):

config.ru

root = ::File.dirname(__FILE__)
require ::File.join( root, 'app' )
run MyApp.new

app.rb

require 'sinatra'
require 'sinatra/namespace'
require 'haml'

class MyApp < Sinatra::Application
  # ...
end

require_relative 'models/init'
require_relative 'helpers/init'
require_relative 'routes/init'

script.haml

%script(type="text/javascript" src="http://ajax.googleapis.com/ajax/libs/jquery/1.6.2/jquery.min.js")
%script(type="text/javascript" src="/js/table.js")
%link(rel="stylesheet" type="text/css" href="/css/table.css")

And yes, I have the correct directory structure in place. Like I sai开发者_高级运维d, it works using require sinatra. Anyone know why this is occurring and what I can do to fix it?

---

Requiring Sinatra::Base does not set any of the default configuration settings that requiring Sinatra does. You'll need to set :public_folder ... to a suitable value yourself, e.g:

set :public_folder, 'public'