Rails - Jul 2005 - newbie having trouble accessing database on rails

I am new to Ruby and Rails. I''ve not been able to run any of the
popular
tutorial samples (OnLamp''s Rolling with Rails and Todo).

In both cases I can''t move beyond the controller piece were I add
scaffold. I
receive the same error for both tutorials.

NoMethodError in Todo#index

undefined method `fetch_fields'' for nil:NilClass
script/server:48

Here is the code from todo_controller.rb

class TodoController < ApplicationController
	model :todo
	scaffold :todo
end

I an running Tiger and noticed other Tiger users had this same problem in
previous posts, but I did not see a resolution response. I''ve tried
everything I
can think of, but no luck so far. I suspect some sort of OS X specific
install/config issue.

Thanks,
Alex