gnus doesn't use nnimap-authinfo-file

[Shnippelson]

Hi

I'm trying to set up gnus but without success.
It is seems to me that gnus doesn't use "nnimap-authinfo-file".
I have the following lines in gnus-init: 

(setq gnus-secondary-select-methods '(
   (nnimap "Work"
   (nnimap-address "mail.work.ru")
   (nnimap-authinfo-file "/home/shnip/.emacs.d/gnus/.authinfo")
   (nnimap-stream ssl)
   (nnimap-server-port 993))))

But gnus reads information from file ~/.authinfo. I can check it by
deleting the file.