uninitialized constant Capistrano in rvm-capistrano

Capfile.rb

load 'deploy'
# Uncomment if you are using Rails' asset pipeline
# load 'deploy/assets'
Dir['vendor/gems/*/recipes/*.rb','vendor/plugins/*/recipes/*.rb'].each { |plugin| load(plugin) }
load 'config/deploy' # remove this line to skip loading any of the default tasks

deploy.rb

require 'torquebox-capistrano-support'
require "rvm/capistrano" # Load RVM's capistrano plugin.
require 'bundler/capistrano'
set :rvm_ruby_string, 'jruby-1.6.7@myproject'
set :use_sudo, true
set :rvm_type, :system
set :stages, %w(staging production)
set :default_stage, "staging"
require 'capistrano/ext/multistage'

set :application, "entercamp"

# ssh to the deploy server
default_run_options[:pty] = true

# TorqueBox specific
set :torquebox_home, '/usr/local/rvm/gems/jruby-1.6.7@global/gems/torquebox-server-2.0.3-java'
set :jboss_home, '/usr/local/rvm/gems/jruby-1.6.7@global/gems/torquebox-server-2.0.3-java/jboss'
set :jruby_home, '/usr/local/rvm/rubies/jruby-1.6.7'
set :jboss_control_style, :binscripts
set :jruby_opts, '--1.9'

# setup scm:
set :repository,  "git@myrepo.org:myusername/myproject.git"
set :deploy_via, :remote_cache
set :scm_username, "myusername"
set :scm, :git
set :scm_verbose, "true"
set :branch, "master"
ssh_options[:forward_agent] = true

set(:releases_path)     { File.join(deploy_to, version_dir) }
set(:shared_path)       { File.join(deploy_to, shared_dir) }
set(:current_path)      { File.join(deploy_to, current_dir) }
set(:release_path)      { File.join(releases_path, release_name) }

set :deploy_to, "/var/deploy/#{application}"


namespace :rvm do
  task :trust_rvmrc do
    run "rvm rvmrc trust #{release_path}"
  end
end

namespace :deploy do
  task :start do
    run "export LAUNCH_JBOSS_IN_BACKGROUND=1; rvm_path=/usr/local/rvm /usr/local/rvm/bin/rvm-shell 'jruby-1.6.7@entercamp' -c 'jruby -S torquebox run'"
  end
  
  task :bootstrap do
    run "cd #{release_path}; jruby -S bundle exec rake bootstrap:roughly RAILS_ENV=#{rails_env}"
  end
end

error

$ jruby -S bundle exec rake RAILS_ENV=staging assets:precompile --trace
rake aborted!
uninitialized constant Capistrano
/var/deploy/entercamp/shared/bundle/jruby/1.9/gems/rvm-capistrano-1.2.2/lib/rvm/capistrano.rb:3:in `(root)'
/var/deploy/entercamp/shared/bundle/jruby/1.9/gems/rvm-capistrano-1.2.2/lib/rvm/capistrano.rb:74:in `require'
/var/deploy/entercamp/shared/bundle/jruby/1.9/gems/rvm-capistrano-1.2.2/lib/rvm/capistrano.rb:74:in `require'
/usr/local/rvm/gems/jruby-1.6.7@global/gems/bundler-1.1.3/lib/bundler/runtime.rb:55:in `each'
/usr/local/rvm/gems/jruby-1.6.7@global/gems/bundler-1.1.3/lib/bundler/runtime.rb:55:in `require'
/usr/local/rvm/gems/jruby-1.6.7@global/gems/bundler-1.1.3/lib/bundler.rb:119:in `require'
/var/deploy/entercamp/releases/20120528054149/config/application.rb:13:in `(root)'
/var/deploy/entercamp/releases/20120528054149/config/application.rb:5:in `require'
/var/deploy/entercamp/releases/20120528054149/config/application.rb:5:in `(root)'
/var/deploy/entercamp/releases/20120528054149/Rakefile:25:in `load'
/var/deploy/entercamp/releases/20120528054149/Rakefile:25:in `load_rakefile'
/var/deploy/entercamp/shared/bundle/jruby/1.9/gems/rake-0.9.2.2/lib/rake/application.rb:501:in `raw_load_rakefile'
/var/deploy/entercamp/shared/bundle/jruby/1.9/gems/rake-0.9.2.2/lib/rake/application.rb:82:in `load_rakefile'
/var/deploy/entercamp/shared/bundle/jruby/1.9/gems/rake-0.9.2.2/lib/rake/application.rb:133:in `standard_exception_handling'
/var/deploy/entercamp/shared/bundle/jruby/1.9/gems/rake-0.9.2.2/lib/rake/application.rb:81:in `load_rakefile'
/var/deploy/entercamp/shared/bundle/jruby/1.9/gems/rake-0.9.2.2/lib/rake/application.rb:65:in `run'
/var/deploy/entercamp/shared/bundle/jruby/1.9/gems/rake-0.9.2.2/lib/rake/application.rb:133:in `standard_exception_handling'
/var/deploy/entercamp/shared/bundle/jruby/1.9/gems/rake-0.9.2.2/lib/rake/application.rb:63:in `run'
/var/deploy/entercamp/shared/bundle/jruby/1.9/gems/rake-0.9.2.2/bin/rake:33:in `(root)'
/var/deploy/entercamp/shared/bundle/jruby/1.9/bin/rake:19:in `load'
/var/deploy/entercamp/shared/bundle/jruby/1.9/bin/rake:19:in `(root)'

Gemfile

source 'https://rubygems.org'

gem 'rails', '3.2.1'
gem 'rake', '0.9.2.2'
gem 'jruby-openssl', :platform => :jruby
gem 'json', "~> 1.6.6"
gem 'mail', "2.4.3"
gem 'jquery-rails'
gem 'twitter-text'
gem "mongoid", "~> 2.4.7"
gem "bson_ext", "~> 1.5"
gem "mongoid-paperclip", :require => "mongoid_paperclip"
gem 'i18n-js'
gem 'activemerchant', :require => 'active_merchant'
gem "chronic", "~> 0.6.7"
gem 'chinese_pinyin'
gem 'devise'
gem "oa-oauth", :require => "omniauth/oauth"
gem "bcrypt-ruby", :require => "bcrypt"
gem 'delayed_job_mongoid'

# Gems used only for assets and not required
# in production environments by default.
group :assets do
  gem 'sass', '~> 3.1.18'#, git: 'git://github.com/nex3/sass.git'
  gem 'sass-rails',   '~> 3.2.3'
  gem 'coffee-rails', '~> 3.2.1'
  gem 'bootstrap-sass', '~> 2.0.3'

  # See https://github.com/sstephenson/execjs#readme for more supported runtimes
  gem "therubyrhino", "~> 1.73.1"

  gem 'uglifier', '>= 1.0.3'
end

group :development, :test do
  gem 'factory_girl_rails', '1.6.0' # use factories instead of fixtures
  gem 'faker', '1.0.1'              # easily create fake data for tests
  gem 'rspec-rails', '2.8.1'        # test framework
  gem 'cucumber-rails', '1.2.1'     # integration test framework
  gem 'simplecov', '0.5.4'          # test coverage report
  gem 'json_spec', '0.8.0'          # easier testing of JSON
  gem 'database_cleaner', '0.7.1'   # manage DB between tests
  gem 'mongoid-rspec', '1.4.4'      # rspec matchers for mongoid
  gem 'autotest'
  gem 'autotest-fsevent'
  gem 'spork', '~> 1.0rc'
  gem "capybara"
end

group :development do
  gem 'ruby-debug', :platform => :jruby
  gem 'columnize', :platform => :jruby
end

# To use ActiveModel has_secure_password
# gem 'bcrypt-ruby', '~> 3.0.0'

# To use Jbuilder templates for JSON
# gem 'jbuilder'

# Use unicorn as the web server
# gem 'unicorn'

# Deploy with Capistrano
gem "capistrano", "~> 2.12.0"
gem 'capistrano-ext', "~> 1.2.1"
gem "torquebox-capistrano-support"
gem 'rvm-capistrano'
# To use debugger
# gem 'ruby-debug'