我在win7下安装了GNU Emacs 24.4.1 (i686-pc-mingw32) on windows,ESS 14.09，并且安装了插件了auto-complete packages ，但是当我在 Emacs中运行R的时候只能出现下拉列表的自动补全，出现不了那个参数的补全，比如我输入app的时候不会出现图片中的黄色部分 (http://www.emacswiki.org/pics/static/ess-ac3)

My auto-complete  configure is following:
;;auto-complete (add-to-list 'load-path "~/.emacs.d/plugins/auto-complete")
(require 'auto-complete-config) (add-to-list 'ac-dictionary-directories "~/.emacs.d/plugins/auto-complete/ac-dict")
(ac-config-default) (auto-complete-mode) (setq ac-use-quick-help nil)
(setq ac-auto-start 4) ;; 输入4个字符才开始补全
(global-set-key "\M-/" 'auto-complete) ;; 补全的快捷键，用于需要提前补全
;; Show menu 0.8 second later
(setq ac-auto-show-menu 0.8) ;; 选择菜单项的快捷键 (
setq ac-use-menu-map t)
(define-key ac-menu-map "\C-n" 'ac-next)
(define-key ac-menu-map "\C-p" 'ac-previous)
;; menu设置为12 lines
(setq ac-menu-height 12) -