NPM authenticate Error

[Atique12]

I am using node version - 0.10.30.

While I am doing running my program I am getting,

Error: Cannot find module './authenticate'
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)

I have install authenticate as well. By saying npm install authenticate.

But no help.