Gulp makes no changes -

i'm starting gulp, don't error seems gulp.watch don't work.
server starts , compile, not refresh changes.
comment lines simplify tasks.
node version: 4.4.7
cli version 1.2.2
local version 3.9.1
os: win7

my gulpfile.js

'use strict'; var gulp = require('gulp'); var less = require('gulp-less'); var browsersync = require('browser-sync').create(); var jade = require('gulp-jade'); var concat = require('gulp-concat');  gulp.task('less', function() {     return gulp.src("./des/less/estilos.less")         .pipe(less())         .pipe(gulp.dest("./prod/css/"))         .pipe(browsersync.stream()); });  gulp.task('less:watch', function () {    gulp.watch('./des/less/*.less', ['less']); });  gulp.task('templates', function() {   gulp.src('./des/jades/*.jade')     .pipe(jade({       pretty: true     }))     .pipe(gulp.dest('./prod'))     .pipe(browsersync.stream()); });  gulp.task('scripts', function() {   //return gulp.src(['./lib/file3.js', './lib/file1.js', './lib/file2.js'])    return gulp.src('./des/js/*.js')     .pipe(concat('all.js'))     .pipe(gulp.dest('./prod/js/'))     .pipe(browsersync.stream()); });  gulp.task('serve', ['less','templates'], function() {     browsersync.init({         server: "./prod",         port: 3000,         browser: ["chrome", "firefox"],         watchoptions : {             ignored : 'node_modules/*',             ignoreinitial : true         }     });   gulp.task('watch', function() {     gulp.watch(["./des/jades/*.jade"], ['templates']);     // gulp.watch("./**/*.less", ['less']);     // gulp.watch("./**/*.js", ['scripts']);     // gulp.watch("./**/*.css").on('change', browsersync.reload);     gulp.watch("./prod/*.html").on('change', browsersync.reload);     // gulp.watch("./**/*.js").on('change', browsersync.reload);   }); });  // gulp.task('default', ['less','lesspublic','lesscommon','templates','serve']); gulp.task('default', ['less','templates', 'scripts', 'serve']); 

thank help

your problem var browsersync pointing create object of "browser-sync" , chaining "stream" object not work because no instance of create object.

you should change

var browsersync = require('browser-sync').create(); 

to

var browsersync = require('browser-sync'); 

with should scope existing objects of browsersync

browsersync.init(); browsersync.create(); browsersync.stream();