Unable to install/run grunt 0.4 (Win 7)

I'm new to grunt and I've just tried to install it following the instructions on http://gruntjs.com/getting-started.

First I install grunt-cli :

npm install -g grunt-cli

In AppData/Roaming I can see these folder and files:

|_ node_modules/
  |_ grunt-cli/
|_ grunt
|_ grund.cmd

Then in my project directory I run:

npm install grunt

Which creates:

|_ node_modules/
  |_ grunt/

But if I try to run grunt, I get an error message saying that "grunt is not recognized as an internal or external command, operable program or batch file". I'm simply trying to run grunt init:jquery for a start, as explained here: http://net.tutsplus.com/tutorials/javascript-ajax/meeting-grunt-the-build-tool-for-javascript/

You need to add path to "npm" stuff to your PATH environment variable: (Right click on My Computer -> Properties -> Advanced system settings -> Environment variables)

Like:

C:\Program Files (x86)\Google\Chrome\Application;*C:\<path_to_node>\node\npm*

and then restart cmd

Referring this link http://gruntjs.com/getting-started grunt is no longer installed globally so run

npm install -g grunt-cli