can't run gulp-compass about gulp-compass HOT 2 CLOSED

var paths = {
    javascript: './public/app/js/*.js',
    compass_config : './public/app/css/config.rb',
    sass: './public/app/css/sass/*.scss',
    sasspath: './public/app/css/sass',
    target_csspath: './public/app/css/stylesheets',
    imagespath : './public/app/css/images'
};

gulp.task('compass', function() {
    gulp.src(paths.sass)
        .pipe(compass({
            css: paths.target_csspath,
            sass: paths.sasspath,
            images: paths.imagespath
        }) )
        .pipe(gulp.dest(paths.target_csspath))
});