undefined method `first' for :users:Symbol

Hello,

I am trying to move an existing fully functional Rails application
from my laptop (Running Leopard) to my Desktop (Running Debian). I
created a new Rails application on the Debian desktop and installed
the restful_authentication plugin. I also changed the routes.db file
to include maps for users and sessions. Now, when I try to start the
WeBrick server, I get the following error:

=> Booting WEBrick...
./script/../config/../vendor/rails/actionpack/lib/action_controller/
routing.rb:406:in `initialize_components': undefined method `first'
for :users:Symbol (NoMethodError)
        from ./script/../config/../vendor/rails/actionpack/lib/
action_controller/routing.rb:340:in `initialize'
        from ./script/../config/../vendor/rails/actionpack/lib/
action_controller/routing.rb:616:in `new'
        from ./script/../config/../vendor/rails/actionpack/lib/
action_controller/routing.rb:616:in `connect'
        from ./script/../config/../vendor/rails/actionpack/lib/
action_controller/routing.rb:645:in `named_route'
        from ./script/../config/../vendor/rails/actionpack/lib/
action_controller/routing.rb:651:in `method_missing'
        from ./script/../config/../config/routes.rb:3
        from ./script/../config/../vendor/rails/actionpack/lib/
action_controller/routing.rb:625:in `draw'
        from ./script/../config/../config/routes.rb:1
         ... 14 levels...
        from ./script/../config/../vendor/rails/activesupport/lib/
active_support/dependencies.rb:147:in `require'
        from ./script/../config/../vendor/rails/railties/lib/commands/
server.rb:30
        from script/server:3:in `require'
        from script/server:3

When I had not altered the routes.rb file, I was able to start the web
server, but clicking on "About your application's environment" said
that it could not find rails/info/properties.

Could someone please help me out with these errors? I guess the first
one is because of what I added to routes.rb. My routes.rb file is
below:

ActionController::Routing::Routes.draw do |map|

  map.resources :users
  map.resource :session

  map.resource :session, :controller => 'session'

  map.signup '/signup', :controller => 'users', :action => 'new'
  map.login '/login', :controller => 'session', :action => 'new'
  map.logout '/logout', :controller => 'session', :action => 'destroy'

  # The priority is based upon order of creation: first created ->
highest priority.

  # Sample of regular route:
  # map.connect 'products/:id', :controller => 'catalog', :action =>
'view'
  # Keep in mind you can assign values other than :controller
and :action

  # Sample of named route:
  # map.purchase 'products/:id/purchase', :controller =>
'catalog', :action => 'purchase'
  # This route can be invoked with purchase_url(:id => product.id)

  # You can have the root of your site routed by hooking up ''
  # -- just remember to delete public/index.html.
  # map.connect '', :controller => "welcome"

  # Allow downloading Web Service WSDL as a file with an extension
  # instead of a file named 'wsdl'
  map.connect ':controller/service.wsdl', :action => 'wsdl'

  # Install the default route as the lowest priority.
  map.connect ':controller/:action/:id'
end

Thanks a lot!
Amrita
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