i am having problem in generate shopping cart
if i use all instructions http://wiki.rubyonrails.org/rails/pages/RailsProductGenerator regarding rails_product
# ruby script/generate site my_first_cart ./script/../config/../lib/productize.rb:1: warning: already initialized constant SITE /usr/local/lib/ruby/gems/1.8/gems/activesupport-1.4.2/lib/ active_support/dependencies.rb:477:in `const_missing': uninitialized constant ActionController::Routing::RouteSet::NamedRoutes (NameError) from ./script/../config/../lib/productize.rb:85:in `reload' from ./script/../config/environment.rb:91 from script/generate:2
Please help
