[imp] cannot change the "option->Personnal information-> Edit your identities" in horde-imp

[daniel]

hello

I try to edit my personnal identities . When i create or change an 
identities i retrieve me in the logging page whith the message above:

Your Mail session has expired. Please login again.

If i see the URL at the bottom of my navigator it's seems i haven't got the 
session number in it.

I can change other prefs. I can choose another language. It 's work. I 've 
got an entrie in mysql table horde_prefs.

And the others things works well. I can work with my mails.

Thank's for your help.

 ##My programs 's versions:

FreeBSD 4.8-RELEASE
PHP 4.3.3
Mysql 4.0.15a
horde 2.2.4
imp 3.2.2
apache 1.3.29

##My Horde config. File horde.php

$conf['prefs']['driver'] = 'sql';


$conf['prefs']['params']['phptype'] = 'mysql';
$conf['prefs']['params']['hostspec'] = 'localhost';
$conf['prefs']['params']['username'] = 'horde';
$conf['prefs']['params']['password'] = '******';
$conf['prefs']['params']['database'] = 'horde';
$conf['prefs']['params']['table'] = 'horde_prefs';


###config imp. file prefs.php


$_prefs['default_identity'] = array(
    'value' => 0,
    'locked' => false,
    'shared' => true,
    'type' => 'implicit'
);