Can't get gulp to run: cannot find module 'gulp-util'

On Windows 7, I've installed gulp as explained here: http://markgoodyear.com/2014/01/getting-started-with-gulp/ .

• npm install gulp -g
• In my app folder: npm install gulp --save-dev
• I create a gulpfile.js file.

But then, when I try to run gulp , I get this error message.

module.js:340
throw err;
      ^
Error: cannot file module 'gulp-util'
at Function.Module._resolveFilename (module.js:338:15)

etc.

But gulp-util is present (in the local app folder) in.

node_modules
    gulp
        node_modules
            gulp-util

What do you think may be the cause?

UPDATE

There is no need to manually install gulp-util from later versions

Check the new getting started page .

If you still have this problem try reinstalling your project's local packages

rm -rf node_modules/
npm install

---

OUTDATED ANSWER

You also need to install gulp-util:

 npm install gulp-util --save-dev

From gulp docs- getting started (3.5):

Install gulp and gulp-util in your project devDependencies