Rubycookbook 15.1 problem

I was following along Lucas’s rubycookbook receipe 15.1 for creating a
ROR application for displaying the o/p of dir command on a windows
machine onoto a browser.

my application is named “check” instead of “status” as given in
receipe.

my C:/Documents and
Settings/ri004902/check/app/controllers/check_controller.rb … file
looks as

class CheckController < ApplicationController
def index
time = Time.now
@time = time
@dr = exec “dir/p”
end
end

and my C:\Documents and
Settings\ri004902\check\app\views\check\index.rhtml … file is

Directory structure at <%= @time %>

<%= @dr %>

.....................................................

I start the webbrick and point my brwser to
http://localhost:3000/check/

what i get is
Application error (Rails)

I tried with @dr= ‘dir/p’ in index of CheckController … but in vain.

could anyone provide me a lead.

Cheers
Rajib