Devise: undefined method `params_authenticatable?' for User:Class - ruby-on-rails

Question

I am using devise for authentication in my rails app.
I keep getting different errors like "undefined method XXXX for User:class".
Looking for some help to setup devise correctly.
I have the module database_authenticable setup for Users and I hit the error:
undefined method `params_authenticatable?' for User:Class
Its comming from the following devise code in lib/devise/strategies/authenticatable.rb
def params_authenticatable?
mapping.to.params_authenticatable?(authenticatable_name)
end
Here are my devise settings:
class User < ActiveRecord::Base
rolify
# Include default devise modules. Others available are:
# :token_authenticatable, :confirmable,
# :lockable, :timeoutable and :omniauthable
devise :database_authenticatable, :registerable,
:recoverable, :trackable, :validatable , :omniauthable, :omniauth_providers => [:linkedin]
.
.
end
class DeviseCreateUsers < ActiveRecord::Migration
def change
create_table(:users) do |t|
## Database authenticatable
t.string :email, :null => false, :default => ""
t.string :encrypted_password, :null => false, :default => ""
## Recoverable
t.string :reset_password_token
t.datetime :reset_password_sent_at
## Rememberable
t.datetime :remember_created_at
## Trackable
t.integer :sign_in_count, :default => 0
t.datetime :current_sign_in_at
t.datetime :last_sign_in_at
t.string :current_sign_in_ip
t.string :last_sign_in_ip
## Confirmable
# t.string :confirmation_token
# t.datetime :confirmed_at
# t.datetime :confirmation_sent_at
# t.string :unconfirmed_email # Only if using reconfirmable
## Lockable
# t.integer :failed_attempts, :default => 0 # Only if lock strategy is :failed_attempts
# t.string :unlock_token # Only if unlock strategy is :email or :both
# t.datetime :locked_at
## Token authenticatable
# t.string :authentication_token
t.timestamps
end
add_index :users, :email, :unique => true
add_index :users, :reset_password_token, :unique => true
# add_index :users, :confirmation_token, :unique => true
# add_index :users, :unlock_token, :unique => true
# add_index :users, :authentication_token, :unique => true
end
end
Mu authentication requirements are straightforward and I want to use Linkedin authentication and eventually allowing other omni auths as well.
I am wondering if I should use socery or something else for simple authentication
Thanks !
I am using Rails4.0