Rackspace authorization Node.js

I'm using node-cloudfiles for authenticating.

var cloudfiles = require('cloudfiles');
var config = {
auth : {
  username: 'my-username',
  apiKey: 'my-api-key'
  }
};

var client = cloudfiles.createClient(config);
console.log(client);

And this is what I'm getting

{ config:
   { auth:
      { username: 'my-username',
        apiKey: 'my-api-key',
        host: 'auth.api.rackspacecloud.com' },
     servicenet: false },
  authorized: false }

The username and apiKey are right, it works in php, but not in node.js

authorized: false 

- where can be the problem?