Not finding npm'ed module

amqp_test.js

var sys = require('sys');
var amqp = require('amqp');

var connection = amqp.createConnection({ host: 'rash.local' });

// Wait for connection to become established.
connection.on('ready', function () {
  // Create a queue and bind to all messages.
  // Use the default 'amq.topic' exchange
  var q = connection.queue('my-queue');
  // Catch all messages
  q.bind('#');

  // Receive messages
  q.subscribe(function (message) {
    // Print messages to stdout
    sys.p(message);
  });
});

command line

[rasheed@rash Desktop]$ node amqp_test.js 

node.js:134
        throw e; // process.nextTick error, or 'error' event on first tick
        ^
Error: Cannot find module 'amqp'
    at Function._resolveFilename (module.js:326:11)
    at Function._load (module.js:271:25)
    at require (module.js:355:19)
    at Object.<anonymous> (/Users/rasheed/Desktop/amqp_test.js:2:12)
    at Module._compile (module.js:411:26)
    at Object..js (module.js:417:10)
    at Module.load (module.js:343:31)
    at Function._load (module.js:302:12)
    at Array.<anonymous> (module.js:430:10)
    at EventEmitter._tickCallback (node.js:126:26)