emacs 21.0.90: pop3 does not work?

[Vladimir Volovich <vvv@vvv.vsu.ru>]

Hi,

with GNU emacs 21.0.90, i get an error when i try to fetch mail from
pop3 server:

Debugger entered--Lisp error: (error "Cannot get new mail.")
  signal(error ("Cannot get new mail."))
  error("Cannot get new mail.")
  byte-code("..." [err yes-or-no-p format "Mail source error (%s).  Continue? " error "Cannot get new mail." 0] 4)
  mail-source-fetch((pop :server "..." :user "..." :port "pop3" :password "...") (lambda (file orig-file) (nnmail-split-incoming file (quote nnmbox-save-mail) (quote #[nil "..." [in-buf nnmbox-mbox-buffer nnmbox-group-alist nnmbox-active-file insert-buffer-substring nnmbox-save-active] 3]) (nnmail-get-split-group orig-file source) (quote nnmbox-active-number))))
  nnmail-get-new-mail(nnmbox #[nil "..." [nnmbox-mbox-buffer nnmbox-save-buffer] 1] "/opt/local/vvv/" nil #[nil "..." [in-buf nnmbox-mbox-buffer nnmbox-group-alist nnmbox-active-file insert-buffer-substring nnmbox-save-active] 3])
  nnmbox-request-scan(nil "")
  gnus-request-scan(nil (nnmbox ""))
  gnus-read-active-file-1((nnmbox "") nil)
  gnus-read-active-file()
  gnus-group-get-new-news(nil)
  call-interactively(gnus-group-get-new-news)

Best,
v.