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/