Files not being written into bucket folders about grunt-s3 HOT 4 CLOSED

module.exports = function(grunt) {
    var folder = 'v0.1';
    grunt.initConfig({
        // Run your source code through JSHint's defaults.
        jshint: ["app/**/*.js"],

        //start grunt s3
        s3: {
            options: {
                key: 'my-key',
                secret: 'my-secret',
                bucket: 'name-my-bucket',
                access: 'public-read',
                headers: {
                    // Two Year cache policy (1000 * 60 * 60 * 24 * 730)
                    "Cache-Control": "max-age=630720000, public",
                    "Expires": new Date(Date.now() + 63072000000).toUTCString()
                }
            },
            dev: {
                // These options override the defaults
                options: {
                    encodePaths: false,
                    //max number of concurrent transfers - if not specified or set to 0, will be unlimited
                    maxOperations: 20
                },
                // Files to be uploaded.
                upload: [
                    {
                   //folder I want to upload
                        src: 'www-built/**/*',
                    //folder of destinity
                        dest: "/"+folder+"/",
                  // path relative to my folder origin
                        rel: '/var/www/my-project/',
                        options: { gzip: true }
                    },
                ],
            }

        }
        //finish grunts3

    });

    // Grunt contribution tasks.
    grunt.loadNpmTasks("grunt-contrib-jshint");
    grunt.loadNpmTasks('grunt-s3');        

    // When running the default Grunt command, just lint the code.
    grunt.registerTask("default", [
        "jshint",
    ]);
};

s3: {
  options: {
    key: 'access key',
    secret: 'secret key',
    bucket: 'myBucket',
    access: 'public-read',
    gzip: true,
    gzipExclude: ['.jpg', '.jpeg.', '.ico', '.gif', '.txt'],
    headers: {
      // Two Year cache policy (1000 * 60 * 60 * 24 * 730)
      //'Cache-Control': 'max-age=630720000, public',
      //'Expires': new Date(Date.now() + 63072000000).toUTCString()
    }
  },
  dist: {
    upload: [{
      src: 'dist/**/*.*',
      dest: '/',
      rel: 'dist'
    } ]
  }
}

Loading "s3.js" tasks...ERROR
>> TypeError: Object #<Object> has no method 'init'

Loading "s3.js" tasks...ERROR
    >> TypeError: Object #<Object> has no method 'init'