title: rails generate rspec:install - no such file to load --sprockets/railtie (LoadError)
body: <p>I'm a RoR-Beginner and I started learning it with the RoR-Tutorial. 
  Actually I'm at this chapter (<a href="http://ruby.railstutorial.org/chapters/static-pages#top" rel="noreferrer">http://ruby.railstutorial.org/chapters/static-pages#top</a>) and try to install rspec. But everytime when I try to use "rails g rspec:install" I get this error message:</p>
  
  <pre><code>C:\Sites\rails\rails_projects\sample_appp&gt;rails g rspec:install
  C:/Sites/rails/rails_projects/sample_appp/config/application.rb:8:in `require':
  no such file to load -- sprockets/railtie (LoadError)
          from C:/Sites/rails/rails_projects/sample_appp/config/application.rb:8:i
  n `&lt;top (required)&gt;'
          from C:/RailsInstaller/Ruby1.9.2/lib/ruby/gems/1.9.1/gems/railties-3.0.9
  /lib/rails/commands.rb:15:in `require'
          from C:/RailsInstaller/Ruby1.9.2/lib/ruby/gems/1.9.1/gems/railties-3.0.9
  /lib/rails/commands.rb:15:in `&lt;top (required)&gt;'
          from script/rails:6:in `require'
          from script/rails:6:in `&lt;main&gt;'
  </code></pre>
  
  <p>Has anybody an idea to help me? I already tried to comment it out in the application.rb or to explicitly mention it in the gemfile. But I still get this error message.</p>
  
  <p>Would be great if anyone could help me. Btw. my OS is Windows XP and I'm using Ruby version 1.9.2.p290 and Rails version 3.1.0.rc6.</p>