update port change not working problem

update: port change not working for livereload config on gruntfile.js

...
        connect: {
            livereload: {
                port: 35728, // not working
                options: {
                    base: "./",
                    port: 9001,
                    middleware: function (connect, options) {
                        return [lrSnippet, mountFolder(connect, options.base)];
                    }
                }
            }
        }
...