请教 gnus 配置，无法阅读新闻组

[sweord]

小弟是新手，刚刚开始用gnus，emacs版本是22.3，自带 gnus.

我的配置是从本版的置顶贴里抄来的：

(setq user-full-name "myname")
(setq user-mail-address "[email protected]")

(setq gnus-select-method '(nntp "news.cn99.com")
gnus-secondary-select-methods
'((nnml "")
;;(nntp "news.individual.net")
;;(nntp "news.gmane.org")
(nntp "news.newsfan.net")
(nntp "news.yaako.com")))

但每次启动后，总是提示无法连接到 nntp:news， 不知道是什么原因 ：（

Loading gnus...done
Loading gnus-start...done
Loading gnus-agent...done
Unable to open nntp:news, go offline? (y or n)

nntp (news) open error: ''. Continue? (y or n)
Loading time-stamp...done
Wrote d:/cygwin/home/fj/.newsrc-dribble
Gnus exited on purpose without saving; read auto-save file anyway? (y or n)
Opening nntp server on news...
Denied server
Opening nntp server on news...failed
Opening nntp server on news...
Denied server
Opening nntp server on news...failed
Checking new news...done
Setting up drafts group
No gnus is bad news
No more unread newsgroups

试了好几天了，google，baidu查了无数网页，还是不能解决。
请大侠们帮忙看看，谢谢！