Getting error while starting server plz help

c:/Ruby193/lib/ruby/gems/1.9.1/gems/rails-2.3.14/lib/rails_generator/options.rb:32:in `default_options': undefined method `write_inheritable_attribute' for Rails::Generator::Base:Class (NoMethodError)
        from c:/Ruby193/lib/ruby/gems/1.9.1/gems/rails-2.3.14/lib/rails_generator/base.rb:90:in `<class:Base>'
        from c:/Ruby193/lib/ruby/gems/1.9.1/gems/rails-2.3.14/lib/rails_generator/base.rb:85:in `<module:Genera
tor>'
        from c:/Ruby193/lib/ruby/gems/1.9.1/gems/rails-2.3.14/lib/rails_generator/base.rb:48:in `<module:Rails>
'
        from c:/Ruby193/lib/ruby/gems/1.9.1/gems/rails-2.3.14/lib/rails_generator/base.rb:6:in `<top (required)
>'
        from c:/Ruby193/lib/ruby/site_ruby/1.9.1/rubygems/custom_require.rb:36:in `require'
        from c:/Ruby193/lib/ruby/site_ruby/1.9.1/rubygems/custom_require.rb:36:in `require'
        from c:/Ruby193/lib/ruby/gems/1.9.1/gems/rails-2.3.14/lib/rails_generator.rb:37:in `<top (required)>'
        from c:/Ruby193/lib/ruby/site_ruby/1.9.1/rubygems/custom_require.rb:36:in `require'
        from c:/Ruby193/lib/ruby/site_ruby/1.9.1/rubygems/custom_require.rb:36:in `require'
        from c:/Ruby193/lib/ruby/gems/1.9.1/gems/rails-2.3.14/bin/rails:15:in `<top (required)>'
        from c:/Ruby193/bin/rails:23:in `load'
        from c:/Ruby193/bin/rails:23:in `<main>'