Getting error in store.js in socket.io while running stepx

[JITENDRA PAWAR]

Hello,

On executing stepx code , I am getting below error, please help & let me know where it is going wrong.

*/var/www/html/webrtc_rnd/webrtc-git/codelab/complete/node_modules/socket.io/lib/store.js:35 Store.prototype.proto = EventEmitter.prototype; ^

TypeError: Cannot read property 'prototype' of undefined at Object.<anonymous> (/var/www/html/webrtc_rnd/webrtc-git/codelab/complete/node_modules/socket.io/lib/store.js:35:41) at Module._compile (module.js:573:32) at Object.Module._extensions..js (module.js:582:10) at Module.load (module.js:490:32) at tryModuleLoad (module.js:449:12) at Function.Module._load (module.js:441:3) at Module.require (module.js:500:17) at require (internal/module.js:20:19) at Object.<anonymous> (/var/www/html/webrtc_rnd/webrtc-git/codelab/complete/node_modules/socket.io/lib/manager.js:16:13) at Module._compile (module.js:573:32) *

I am using below package.json file.

{
  "name": "codelab",
  "version": "0.0.1",
  "description": "WebRTC codelab",
  "main": "index.js",
  "scripts": {
    "test": "echo \"Error: no test specified\" && exit 1"
  },
  "repository": {
    "type": "git",
    "url": "https://bitbucket.org/webrtc/codelab"
  },
  "keywords": [
    "webrtc",
    "codelab"
  ],
  "author": "webrtc",
  "license": "MIT",
  "dependencies": {
    "node-static": "~0.7.1",
    "socket.io": "~0.9.16",
    "express": "~3.4.0"
  }
}

Please help.