Why doesn't emacs update files?

Question

Lisp

I have the sr-speedbar package. Here is a simple config for it:

(require 'sr-speedbar)
(global-set-key (kbd "<f12>") 'sr-speedbar-toggle)
(setq speedbar-show-unknown-files t)
(setq sr-speedbar-right-side nil)
(setq speedbar-directory-unshown-regexp "^\\(CVS\\|RCS\\|SCCS\\|\\.\\.*$\\)\\'")
(setq sr-speedbar-auto-refresh t)

I tried adding/removing the last line - the result is the same.
I create a file, but it is not visible in the speedbar. - It's impossible to work. What could be the problem?
Thanks to all.