Error: Cannot find module 'socket.io/node_modules/redis' on Mac

I am trying to run this example (http://maxburstein.com/blog/realtime-django-using-nodejs-and-socketio/) but I'm getting this error:

module.js:340
    throw err;
          ^
Error: Cannot find module 'socket.io/node_modules/redis'
    at Function.Module._resolveFilename (module.js:338:15)
    at Function.Module._load (module.js:280:25)
    at Module.require (module.js:364:17)
    at require (module.js:380:17)
    at Object.<anonymous> (/Users/felipemoran/Desktop/django-realtime-tutorial-master/nodejs/chat.js:7:13)
    at Module._compile (module.js:456:26)
    at Object.Module._extensions..js (module.js:474:10)
    at Module.load (module.js:356:32)
    at Function.Module._load (module.js:312:12)
    at Function.Module.runMain (module.js:497:10)

What I did so far was:

• Unpack the source files - ok
• Start Redis server (by typing on terminal redis-server) - ok
• Start Django server (by typing on a different window python manage.py runserver, while in the propper folder) - ok

The next step would be, on a third terminal window, run the command node chat.js, while in the folder nodejs folder from the example files, but I'm getting this error.

I'm on Mac OS X Maverics, I installed node.js from the official mac installer and I installed socket.io using the npm command.

I also tried running rpm install socket.io -g , rpm install -g socket.io, those two with sudo and runing these commands from the nodejs folder but still no success.

Thanks!