rspec problem with mocks and before_create

gistfile1.rb

      
# The spec
let(:stamp){ mock_model(CompanyStamp) }
let(:signature){ mock_model(CompanyHandwrittenSignature) }
let(:account) { mock_model(Account, :company_handwritten_signature => signature, :company_stamp => stamp) }
it "should have signature if the account has signature" do
  subject.account = account
  subject.stub(:save).and_return(true)
  subject.company_handwritten_signature.should == signature
end

# the model's code
before_create do |element|
  puts "element.account ===> #{element.account.inspect}"  # element has no account! why?!?!?!?
  element.company_handwritten_signature ||= element.account.company_handwritten_signature
  element.company_stamp ||= element.account.company_stamp
  true
end