gem install passenger # version 3.0.2 run the command 'passenger start' then I got the error: c:/Ruby187/lib/ruby/gems/1.8/gems/passenger-3.0.2/lib/phusion_passenger/plugin.r b:37:in `load': undefined method `dir' for nil:NilClass (NoMethodError) from c:/Ruby187/lib/ruby/gems/1.8/gems/passenger-3.0.2/lib/phusion_passe nger/plugin.rb:34:in `each' from c:/Ruby187/lib/ruby/gems/1.8/gems/passenger-3.0.2/lib/phusion_passe nger/plugin.rb:34:in `load' from c:/Ruby187/lib/ruby/gems/1.8/gems/passenger-3.0.2/lib/phusion_passe nger/plugin.rb:72:in `initialize' from c:/Ruby187/lib/ruby/gems/1.8/gems/passenger-3.0.2/lib/phusion_passe nger/standalone/start_command.rb:52:in `new' from c:/Ruby187/lib/ruby/gems/1.8/gems/passenger-3.0.2/lib/phusion_passe nger/standalone/start_command.rb:52:in `initialize' from c:/Ruby187/lib/ruby/gems/1.8/gems/passenger-3.0.2/lib/phusion_passe nger/standalone/main.rb:93:in `new' from c:/Ruby187/lib/ruby/gems/1.8/gems/passenger-3.0.2/lib/phusion_passe nger/standalone/main.rb:93:in `run_command' from c:/Ruby187/lib/ruby/gems/1.8/gems/passenger-3.0.2/lib/phusion_passe nger/standalone/main.rb:48:in `each_command' from c:/Ruby187/lib/ruby/gems/1.8/gems/passenger-3.0.2/lib/phusion_passe nger/standalone/main.rb:43:in `each' from c:/Ruby187/lib/ruby/gems/1.8/gems/passenger-3.0.2/lib/phusion_passe nger/standalone/main.rb:43:in `each_command' from c:/Ruby187/lib/ruby/gems/1.8/gems/passenger-3.0.2/lib/phusion_passe nger/standalone/main.rb:91:in `run_command' from c:/Ruby187/lib/ruby/gems/1.8/gems/passenger-3.0.2/lib/phusion_passe nger/standalone/main.rb:62:in `run!' from c:/Ruby187/lib/ruby/gems/1.8/gems/passenger-3.0.2/lib/phusion_passe nger/standalone/main.rb:39:in `run!' from c:/Ruby187/lib/ruby/gems/1.8/gems/passenger-3.0.2/bin/passenger:32 from c:/Ruby187/bin/passenger:19:in `load' from c:/Ruby187/bin/passenger:19 Any ideas would be greatly appreciated.