How to install node express into my titanium studio?

Hi Friends,

I need to create simple chat application. So I have already below configuration development environment :

Titanium Studio 3.1.3 I have already configured Node

If I trying to install "express" in titanium I received below error logs

0 info it worked if it ends with ok
1 verbose cli [ 'node', '/usr/local/bin/npm', 'install', '--save', 'express' ]
2 info using npm@1.4.21
3 info using node@v0.10.30
4 verbose readDependencies using package.json deps
5 verbose cache add [ 'express', null ]
6 verbose cache add name=undefined spec="express" args=["express",null]
7 verbose parsed url { protocol: null,
7 verbose parsed url   slashes: null,
7 verbose parsed url   auth: null,
7 verbose parsed url   host: null,
7 verbose parsed url   port: null,
7 verbose parsed url   hostname: null,
7 verbose parsed url   hash: null,
7 verbose parsed url   search: null,
7 verbose parsed url   query: null,
7 verbose parsed url   pathname: 'express',
7 verbose parsed url   path: 'express',
7 verbose parsed url   href: 'express' }
8 silly lockFile f3c62de4-express express
9 verbose lock express /Users/nano/.npm/f3c62de4-express.lock
10 silly lockFile f3c62de4-express express
11 error Error: Attempt to unlock express, which hasn't been locked
11 error     at unlock (/usr/local/lib/node_modules/npm/lib/utils/locker.js:44:11)
11 error     at cb (/usr/local/lib/node_modules/npm/lib/cache/add-local.js:30:5)
11 error     at /usr/local/lib/node_modules/npm/lib/cache/add-local.js:47:20
11 error     at /usr/local/lib/node_modules/npm/lib/utils/locker.js:30:7
11 error     at /usr/local/lib/node_modules/npm/node_modules/lockfile/lockfile.js:167:38
11 error     at Object.oncomplete (fs.js:107:15)
12 error If you need help, you may report this *entire* log,
12 error including the npm and node versions, at:
12 error     <http://github.com/npm/npm/issues>
13 error System Darwin 13.3.0
14 error command "node" "/usr/local/bin/npm" "install" "--save" "express"
15 error cwd /Users/nano/Desktop/Icebb_Mobileworkspace/ChatApp
16 error node -v v0.10.30
17 error npm -v 1.4.21
18 verbose exit [ 1, true ]

Thanks, Sabari C