gem file formtastic not working on heroku

formtastic-boostrap-heroku

source 'https://rubygems.org'

gem 'rails', '3.2.1'

# Bundle edge Rails instead:
# gem 'rails', :git => 'git://github.com/rails/rails.git'

# Gems used only for assets and not required
# in production environments by default.
group :assets do
  gem 'sass-rails',   '~> 3.2.3'
  gem 'coffee-rails', '~> 3.2.1'

  # See https://github.com/sstephenson/execjs#readme for more supported runtimes
  # gem 'therubyracer'
  
  
  #gem 'formtastic', '2.1.1'
  
  gem 'formtastic-bootstrap', git: 'git://github.com/cgunther/formtastic-bootstrap.git', branch: 'bootstrap2-rails3-2-formtastic-2-1'
  gem 'formtastic', git: 'git://github.com/justinfrench/formtastic.git', branch: '2.1-stable'
  gem 'twitter-bootstrap-rails', :git => 'http://github.com/seyhunak/twitter-bootstrap-rails.git'
  gem 'font-awesome-rails'
  gem 'jquery-rails'
  gem 'uglifier', '>= 1.0.3'
end

gem 'bson_ext'
gem 'mongoid', '>= 2.0.0.beta.19'
gem 'devise'
gem 'state_machine'
gem 'mongoid-history', '0.2.1'
gem 'mongoid_taggable_with_context'

#crap
gem 'tinymce-rails'


gem 'rspec-rails', '>= 2.0.1', :group => [:development, :test]

heroku build

-----> Heroku receiving push
-----> Removing .DS_Store files
-----> Ruby/Rails app detected
-----> Installing dependencies using Bundler version 1.1.0
       Running: bundle install --without development:test --path vendor/bundle --binstubs bin/ --deployment
       Using rake (0.9.2.2)
       Using i18n (0.6.0)
       Using multi_json (1.1.0)
       Using activesupport (3.2.1)
       Using builder (3.0.0)
       Using activemodel (3.2.1)
       Using erubis (2.7.0)
       Using journey (1.0.3)
       Using rack (1.4.1)
       Using rack-cache (1.2)
       Using rack-test (0.6.1)
       Using hike (1.2.1)
       Using tilt (1.3.3)
       Using sprockets (2.1.2)
       Using actionpack (3.2.1)
       Using mime-types (1.17.2)
       Using polyglot (0.3.3)
       Using treetop (1.4.10)
       Using mail (2.4.4)
       Using actionmailer (3.2.1)
       Using arel (3.0.2)
       Using tzinfo (0.3.32)
       Using activerecord (3.2.1)
       Using activeresource (3.2.1)
       Using bcrypt-ruby (3.0.1)
       Using bson (1.6.1)
       Using bson_ext (1.6.1)
       Using coffee-script-source (1.2.0)
       Using execjs (1.3.0)
       Using coffee-script (2.2.0)
       Using rack-ssl (1.3.2)
       Using json (1.6.5)
       Using rdoc (3.12)
       Using thor (0.14.6)
       Using railties (3.2.1)
       Using coffee-rails (3.2.2)
       Using commonjs (0.2.4)
       Using orm_adapter (0.0.6)
       Using warden (1.1.1)
       Using devise (2.0.4)
       Using easy_diff (0.0.2)
       Using font-awesome-rails (0.2.1)
       Using formtastic (2.1.1) from git://github.com/justinfrench/formtastic.git (at 2.1-stable)
       Using bundler (1.1.0)
       Using rails (3.2.1)
       Using formtastic-bootstrap (1.1.2) from git://github.com/cgunther/formtastic-bootstrap.git (at bootstrap2-rails3-2-formtastic-2-1)
       Using jquery-rails (2.0.1)
       Using libv8 (3.3.10.4)
       Using therubyracer (0.9.10)
       Using less (2.0.11)
       Using less-rails (2.1.8)
       Using mongo (1.6.1)
       Using mongoid (2.4.6)
       Using mongoid-history (0.2.1)
       Using mongoid_taggable_with_context (0.8.1)
       Using sass (3.1.15)
       Using sass-rails (3.2.4)
       Using state_machine (1.1.2)
       Using tinymce-rails (3.4.8)
       Using twitter-bootstrap-rails (2.0.4) from http://github.com/seyhunak/twitter-bootstrap-rails.git (at master)
       Using uglifier (1.2.3)
       Your bundle is complete! It was installed into ./vendor/bundle
       Cleaning up the bundler cache.
-----> Writing config/database.yml to read from DATABASE_URL
-----> Preparing app for Rails asset pipeline
       Running: rake assets:precompile
       mkdir -p /tmp/build_31nbew687wt7n/public/assets
       cp -r /tmp/build_31nbew687wt7n/vendor/bundle/ruby/1.9.1/gems/tinymce-rails-3.4.8/assets/precompiled/tinymce /tmp/build_31nbew687wt7n/public/assets
-----> Rails plugin injection
       Injecting rails_log_stdout
       Injecting rails3_serve_static_assets
-----> Discovering process types
       Procfile declares types      -> (none)
       Default types for Ruby/Rails -> console, rake, web, worker
-----> Compiled slug size is 31.5MB
-----> Launching... done, v5

heroku failure

2012-03-20T16:09:05+00:00 app[web.1]: => Booting WEBrick
2012-03-20T16:09:05+00:00 app[web.1]: => Call with -d to detach
2012-03-20T16:09:05+00:00 app[web.1]: => Ctrl-C to shutdown server
2012-03-20T16:09:05+00:00 app[web.1]: => Rails 3.2.1 application starting in production on http://0.0.0.0:31082
2012-03-20T16:09:05+00:00 app[web.1]: Exiting
2012-03-20T16:09:05+00:00 app[web.1]: /app/config/initializers/formtastic.rb:15:in `<top (required)>': uninitialized constant Formtastic::FormBuilder (NameError)
2012-03-20T16:09:05+00:00 app[web.1]: 	from /app/vendor/bundle/ruby/1.9.1/gems/railties-3.2.1/lib/rails/engine.rb:587:in `each'
2012-03-20T16:09:05+00:00 app[web.1]: 	from /app/vendor/bundle/ruby/1.9.1/gems/railties-3.2.1/lib/rails/engine.rb:588:in `block (2 levels) in <class:Engine>'
2012-03-20T16:09:05+00:00 app[web.1]: 	from /app/vendor/bundle/ruby/1.9.1/gems/railties-3.2.1/lib/rails/initializable.rb:30:in `instance_exec'
2012-03-20T16:09:05+00:00 app[web.1]: 	from /app/vendor/bundle/ruby/1.9.1/gems/railties-3.2.1/lib/rails/engine.rb:587:in `block in <class:Engine>'
2012-03-20T16:09:05+00:00 app[web.1]: 	from /app/vendor/bundle/ruby/1.9.1/gems/railties-3.2.1/lib/rails/initializable.rb:30:in `run'
2012-03-20T16:09:05+00:00 app[web.1]: 	from /app/vendor/bundle/ruby/1.9.1/gems/railties-3.2.1/lib/rails/initializable.rb:55:in `block in run_initializers'
2012-03-20T16:09:05+00:00 app[web.1]: 	from /app/vendor/bundle/ruby/1.9.1/gems/railties-3.2.1/lib/rails/initializable.rb:54:in `each'
2012-03-20T16:09:05+00:00 app[web.1]: 	from /app/vendor/bundle/ruby/1.9.1/gems/railties-3.2.1/lib/rails/initializable.rb:54:in `run_initializers'
2012-03-20T16:09:05+00:00 app[web.1]: 	from /app/vendor/bundle/ruby/1.9.1/gems/railties-3.2.1/lib/rails/application.rb:136:in `initialize!'
2012-03-20T16:09:05+00:00 app[web.1]: 	from /app/config/environment.rb:5:in `<top (required)>'
2012-03-20T16:09:05+00:00 app[web.1]: 	from /app/vendor/bundle/ruby/1.9.1/gems/railties-3.2.1/lib/rails/railtie/configurable.rb:30:in `method_missing'
2012-03-20T16:09:05+00:00 app[web.1]: 	from /app/vendor/bundle/ruby/1.9.1/gems/rack-1.4.1/lib/rack/builder.rb:51:in `instance_eval'
2012-03-20T16:09:05+00:00 app[web.1]: 	from /app/config.ru:4:in `block in <main>'
2012-03-20T16:09:05+00:00 app[web.1]: 	from /app/vendor/bundle/ruby/1.9.1/gems/rack-1.4.1/lib/rack/builder.rb:51:in `initialize'
2012-03-20T16:09:05+00:00 app[web.1]: 	from /app/config.ru:1:in `new'
2012-03-20T16:09:05+00:00 app[web.1]: 	from /app/config.ru:1:in `<main>'
2012-03-20T16:09:05+00:00 app[web.1]: 	from /app/vendor/bundle/ruby/1.9.1/gems/rack-1.4.1/lib/rack/builder.rb:40:in `parse_file'
2012-03-20T16:09:05+00:00 app[web.1]: 	from /app/vendor/bundle/ruby/1.9.1/gems/rack-1.4.1/lib/rack/builder.rb:40:in `eval'
2012-03-20T16:09:05+00:00 app[web.1]: 	from /app/vendor/bundle/ruby/1.9.1/gems/railties-3.2.1/lib/rails/commands/server.rb:46:in `app'
2012-03-20T16:09:05+00:00 app[web.1]: 	from /app/vendor/bundle/ruby/1.9.1/gems/rack-1.4.1/lib/rack/server.rb:200:in `app'
2012-03-20T16:09:05+00:00 app[web.1]: 	from /app/vendor/bundle/ruby/1.9.1/gems/railties-3.2.1/lib/rails/commands.rb:55:in `block in <top (required)>'
2012-03-20T16:09:05+00:00 app[web.1]: 	from /app/vendor/bundle/ruby/1.9.1/gems/railties-3.2.1/lib/rails/commands.rb:50:in `tap'
2012-03-20T16:09:05+00:00 app[web.1]: 	from /app/vendor/bundle/ruby/1.9.1/gems/rack-1.4.1/lib/rack/server.rb:252:in `start'
2012-03-20T16:09:05+00:00 app[web.1]: 	from /app/vendor/bundle/ruby/1.9.1/gems/rack-1.4.1/lib/rack/server.rb:301:in `wrapped_app'
2012-03-20T16:09:05+00:00 app[web.1]: 	from /app/vendor/bundle/ruby/1.9.1/gems/railties-3.2.1/lib/rails/commands/server.rb:70:in `start'
2012-03-20T16:09:05+00:00 app[web.1]: 	from /app/vendor/bundle/ruby/1.9.1/gems/railties-3.2.1/lib/rails/commands.rb:50:in `<top (required)>'
2012-03-20T16:09:05+00:00 app[web.1]: 	from script/rails:6:in `require'
2012-03-20T16:09:05+00:00 app[web.1]: 	from script/rails:6:in `<main>'
2012-03-20T16:09:06+00:00 heroku[web.1]: Process exited with status 1
2012-03-20T16:09:06+00:00 heroku[web.1]: State changed from starting to crashed