Unable to Seed Data for Authlogic

When I run rake db:seed in my Rails 3 application I get the following error; anyone know how to resolve it?

rake aborted! undefined method 'find_or_create_by_first_name_and_last_name_and_role_and_email_and_password_and_password_confirmation'

Below are my create_users.rb,user.rb, and seeds.rb files respectively.

create_users.rb:

def self.up     create_table :users do |t|       t.string :first_name, :null => false       t.string :last_name, :null => false       t.string :role, :null => false       t.string :email, :null => false       t.string :crypted_password, :null => false       t.string :password_salt, :null => false       t.string :persistence_token, :null => false       t.string :current_login_ip       t.string :last_login_ip       t.datetime :current_login_at       t.datetime :last_login_at

      t.timestamps     end   end

user.rb:

class User < ActiveRecord::Base   acts_as_authentic end

seeds.rb:

User.find_or_create_by_first_name_and_last_name_and_role_and_email_and_password_and_password_confirmation(...)

password and password_confirmation do not exist in the table.

Colin