Babylon missing ...

lsoave@ubuntu:~/heroku$ sudo gem install superfeedr-ruby --no-ri --no-RDoc
Successfully installed skates-0.2.6
Successfully installed superfeedr-ruby-0.4.0
2 gems installed
lsoave@ubuntu:~/heroku$ gem list superfeedr

*** LOCAL GEMS ***

superfeedr-nokogiri (1.4.0.20091116183308)
superfeedr-rb (0.1.0)
superfeedr-ruby (0.4.0)
superfeedr-sax-machine (0.0.22.2)
lsoave@ubuntu:~/heroku$ gem list skates

*** LOCAL GEMS ***

skates (0.2.6)
lsoave@ubuntu:~/heroku$ irb
irb(main):001:0> require "rubygems"
=> true
irb(main):002:0> require "superfeedr"
DEPRECATION WARNING: require "activesupport" is deprecated and will be removed in Rails 3. Use require "active_support" instead.. (called from /usr/lib/ruby/gems/1.8/gems/activesupport-2.3.5/lib/activesupport.rb:2)
NameError: uninitialized constant Babylon
	from /usr/lib/ruby/gems/1.8/gems/activesupport-2.3.5/lib/active_support/dependencies.rb:443:in `load_missing_constant'
	from /usr/lib/ruby/gems/1.8/gems/activesupport-2.3.5/lib/active_support/dependencies.rb:80:in `const_missing'
	from /usr/lib/ruby/gems/1.8/gems/activesupport-2.3.5/lib/active_support/dependencies.rb:92:in `const_missing'
	from /usr/lib/ruby/gems/1.8/gems/superfeedr-ruby-0.4.0/lib/superfeedr.rb:10
	from /usr/local/lib/site_ruby/1.8/rubygems/custom_require.rb:36:in `gem_original_require'
	from /usr/local/lib/site_ruby/1.8/rubygems/custom_require.rb:36:in `require'
	from (irb):2
irb(main):003:0>