uuid_it : Can't mass-assign protected attributes: uuid - ruby-on-rails

Question

I used uuid_id gem to generate UUID for various models in my application(Rails 3.2.5 with Ruby 1.9.3p194). I correctly followed the steps given here
I am getting this error while creating the model tagged as uuid_it. It works fine if I remove uuid_it call from the model
Here is snapshot of the log
SQL (2.1ms) INSERT INTO "applications" ("created_at", "description", "name", "updated_at") VALUES ($1, $2, $3, $4) RETURNING "id" [["created_at", Mon, 03 Sep 2012 10:17:59 UTC +00:00], ["description", "data mining"], ["name", "BlueBerry"], ["updated_at", Mon, 03 Sep 2012 10:17:59 UTC +00:00]]
Uuid Load (1.2ms) SELECT "uuids".* FROM "uuids" WHERE "uuids"."uuidable_id" = 5 AND "uuids"."uuidable_type" = 'Application' LIMIT 1
(0.2ms) ROLLBACK
Completed 500 Internal Server Error in 81ms
ActiveModel::MassAssignmentSecurity::Error (Can't mass-assign protected attributes: uuid):
app/controllers/applications_controller.rb:13:in `create'
where line 13 is application.create
EDIT
app/controllers/applications.rb
class ApplicationsController < ApplicationController
# some code here
def create
#application = Application.new(params[:application])
#application.creator = current_user
#application.organization = current_organization
if #application.save
redirect_to #application, notice: "Successfully created application."
else
render action: 'new'
end
end
# few lines here
end