Why doesn't gulp.spritesmith create sprites?

Question

JavaScript

I don't even know what could be the problem when using gulp.spritesmith
gulpfile.js

var gulp = require('gulp');
var spritesmith = require('gulp.spritesmith');

gulp.task('sprite', function () {
  var spriteData = gulp.src('./images/*.png').pipe(spritesmith({
    imgName: 'sprite.png',
    cssName: 'sprite.css'
  }));
  spriteData.pipe(gulp.dest('./path/'));
});

also globally installed: phantomjs , gm , pngsmith
and when running gulp sprite
cmd

$ gulp sprite
[00:04:02] Using gulpfile d:\[www]\gulp\test2\gulpfile.js
[00:04:02] Starting 'sprite'...
[00:04:02] Finished 'sprite' after 11 ms

Everything seems to be fine, but there are no files.
Maybe someone faced such a problem?