[SM-PLUGINS] Error "This page request could not be verified" in add_address

[Katharina D. <kat...@no...>]

Description:
Clicking on email in inbox. Clicking at "add to addressbook", no changes made
(fields are filled automatically), clicking to "add address" ->
I get the output

FEHLER
This page request could not be verified and appears to have expired.
Gehe zur Login-Seite

and I have to login again.

SquirrelMail version:   1.4.21
Plugins installed:
        address_add
        administrator
        avelsieve
        bug_report
        calendar
        compatibility
        delete_move_next
        demo
        filters
        fortune
        info
        listcommands
        mail_fetch
        message_details
        newmail
        sent_subfolders
        spamcop
        squirrelspell
        test
        translate
        view_as_html
PHP version 5.3.3-7+squeeze3 OK.
Web server:     apache 2.2.16-6+squeeze1
IMAP server:    cyrus-imapd-2.2                           2.2.13-14+lenny4
SMTP server:    exim4   4.69-9+lenny4
OS:     Debian Squeeze 6.0.2
kernel: 2.6.32-5-amd64 #1
installation: with aptitude, the add_address plugin by untaring
        address_add-2.1-1.4.0.tar.gz and conf.pl
Browsers tried: Firefox 6.0, opera 11.50


-- 
Freundliche Grüße