Disclaimer : Ruby Nuby
Install:

[C:] C:\Develop\ruby\bin
>gem install creditcard --include-dependencies
Successfully installed creditcard-1.0
Installing ri documentation for creditcard-1.0...
Installing RDoc documentation for creditcard-1.0...

Restarted server...

Source :

class ContractPayment < ActiveRecord::Base

  set_table_name "contract_payment"
  set_primary_key "contract_payment_id"
  set_sequence_name "contract_payment_id_seq"

  belongs_to :contract, :foreign_key => "contract_id"

  validates_presence_of :contract_id, :credit_card_type_code,
:credit_card_type_prefix, :credit_card_expiration_date,
:credit_card_number, :credit_card_validation_code
  validates_numericality_of :credit_card_number
  validates_length_of :credit_card_number, :within => 13..16

  require "creditcard"
...

Restarted server to pick model changes...

Result :

" TypeError in Offer renewalController#take_payment

CreditCard is not a module"


Okay, so what silly mistake am I making.

Thanks,
Jason