Rails - Jun 2006 - iteration A1 in ebook: scaffold gets: routing error

hi, on page 82 of second edition, getting stuck after making:

class AdminController < ApplicationController
         scaffold :product
end

running the server and going to: http://localhost:3000/admin gets:

ActionController: Exception caught
routing error
Recognition failed for "/admin"

did i miss a step somewhere?

thanks

---
vice-chair http://ocjug.org/