grunt server can't be connected <gruntjs>

module.exports = function(grunt) {

  // Project configuration.
    grunt.initConfig({
      server: {
        port: 8888,
        base: '.'
      }
    });

};

C:\Program Files\nodejs\test\grunt>
C:\Program Files\nodejs\test\grunt>grunt server
Running "server" task
Starting static web server on port 8888.

Done, without errors.

but can't connected by input [http://127.0.0.1:8888][1] in browsers ! jiong~

How about to fix this problem in windows or unix ?