error upon heroku create, rails 2.3.8

I'm running rails 2.3.8 on Windows XP and trying for my first time to deploy on Heroku. Everything works fine in development but when I do heroku create, I get the following, any ideas? Thanks.

C:/Ruby/lib/ruby/gems/1.8/gems/rest-client-1.6.1/lib/restclient/abstract_response.rb:50: warning: parenthesize argument(s) for future version
C:/Ruby/lib/ruby/gems/1.8/gems/heroku-2.1.4/lib/heroku/command/base.rb:130:in `extract_description': wrong argument type Symbol (expected Proc) (TypeError)
        from C:/Ruby/lib/ruby/gems/1.8/gems/heroku-2.1.4/lib/heroku/command/base.rb:126:in `extract_summary'
        from C:/Ruby/lib/ruby/gems/1.8/gems/heroku-2.1.4/lib/heroku/command/base.rb:64:in `method_added'
        from C:/Ruby/lib/ruby/gems/1.8/gems/heroku-2.1.4/lib/heroku/command/addons.rb:14
        from C:/Ruby/lib/ruby/site_ruby/1.8/rubygems/custom_require.rb:31:in `gem_original_require'
        from C:/Ruby/lib/r开发者_StackOverflow中文版uby/site_ruby/1.8/rubygems/custom_require.rb:31:in `require'
        from C:/Ruby/lib/ruby/gems/1.8/gems/heroku-2.1.4/lib/heroku/command.rb:17:in `load'
        from C:/Ruby/lib/ruby/gems/1.8/gems/heroku-2.1.4/lib/heroku/command.rb:16:in `each'
        from C:/Ruby/lib/ruby/gems/1.8/gems/heroku-2.1.4/lib/heroku/command.rb:16:in `load'
        from C:/Ruby/lib/ruby/gems/1.8/gems/heroku-2.1.4/bin/heroku:13
        from C:/Ruby/bin/heroku:19:in `load'
        from C:/Ruby/bin/heroku:19