Server don't work ruby on rails at Neatbens 8.0.2

i have neatbens 8.0.2 and I load a proyect of ruby on rails. The version of ruby its 1.8.7 and rails 2.3.5. When play the server output

./script/../config/../config/preinitializer.rb:5: Could not load the bundler gem. Install it with gem install bundler. (RuntimeError) from ./script/../config/boot.rb:28:in load' from ./script/../config/boot.rb:28:inpreinitialize' from ./script/../config/boot.rb:10:in boot!' from ./script/../config/boot.rb:114 from script/server:2:inrequire' from script/server:2

I put 127.0.0.1/3000 in chrome and dont see nothing.