"3168"
C:/Ruby187/lib/ruby/gems/1.8/gems/activesupport-2.3.5/lib/active_support/dependencies.rb:55: uninitialized constant ActiveSupport::Dependencies::Mutex (NameError)
    from C:/Ruby187/lib/ruby/site_ruby/1.8/rubygems/custom_require.rb:36:in `gem_original_require'
    from C:/Ruby187/lib/ruby/site_ruby/1.8/rubygems/custom_require.rb:36:in `require'
    from C:/Ruby187/lib/ruby/gems/1.8/gems/activesupport-2.3.5/lib/active_support.rb:56
    from C:/Ruby187/lib/ruby/site_ruby/1.8/rubygems/custom_require.rb:36:in `gem_original_require'
    from C:/Ruby187/lib/ruby/site_ruby/1.8/rubygems/custom_require.rb:36:in `require'
    from C:/Ruby187/lib/ruby/gems/1.8/gems/rails-2.3.5/lib/commands/server.rb:1
    from C:/Ruby187/lib/ruby/site_ruby/1.8/rubygems/custom_require.rb:36:in `gem_original_require'
    from C:/Ruby187/lib/ruby/site_ruby/1.8/rubygems/custom_require.rb:36:in `require'
    from ./script/server:3
    from -e:2:in `load'
    from -e:2