Help! gnus doesnot download mail

[Meatball]

I'm using debian3.0+emacs21.3.1+gnus5.10.6, when I use root to login and
enter gnus, I can read mail, but when I use normal account to login,
gnus cannot download mail, there's no groups in nnml server, and if I
use A A to list all groups, there's no mail.* group. Did any one meet
this situation? Please help me! Here is my .gnus:

(setq gnus-select-method '(nntp "news.newsfan.net"))

(setq gnus-secondary-select-methods
      '(
        (nnml "")
        (nntp "news.eclipse.org")
))
(eval-after-load "mail-source"
  '(add-to-list 'mail-sources '(maildir :path "/var/mail/"
                                        :subdirs ("mbli"))))


btw, I run fetchmail at startup to fetch my mail

thx