Routing Error, Michael Hartl's Screencasts from railstutorial.org

Question

I am following Michael Hartl's Screencasts from railstutorial.org. According to chapter 5, I changed config/routes.rb to:

SampleApp::Application.routes.draw do
  match '/contact', :to => 'pages#contact'
  match '/about',   :to => 'pages#about'
  match '/help',    :to => 'pages#help'
  root :to => 'pages#home'
end

and _footer.html.erb to:

• <%= link_to "About", about_path %>
• <%= link_to "Contact", contact_path %>

and _header.html.erb to:

 <% logo = image_tag("logo.png", :alt => "Sample App", :class => "round") %>
 <%= link_to logo, root_path %>
 <nav class="round">
    <ul>
      <li><%= link_to "Home", root_path %></li>
      <li><%= link_to "Help", help_path %></li>

I am new to Ruby on Rails. I am getting a Routing Error in the browser

No route matches "/pages/contact"

I am using ruby 1.9.2p180 (2011-02-18 revision 30909) [x86_64-linux], rails 3.0.7 and gem 1.6.2 Please help.