[imp] Problem with Linking attachments

[T Test]

Hi,

I install a new version of Horde Groupware, ver. 5.2.22 with IMP 6.2.24.

I have a big problem: Linking attachments not working!!

On a old version of Horde I have Horde 3.3.12 with IMP ver. 4.3.10.

In this version I can send an e-mail with linking attachmente without 
problem.

On a new version, there isn't a link to send an online attachments.

The page that I show on a new version is this:


Can we help me?

This is the configuration file of imp:

<?php
/* CONFIG START. DO NOT CHANGE ANYTHING IN OR AFTER THIS LINE. */
// $Id: 48bf0b4cc99e7941b4432a29e70e145b8d654cc7 $
$conf['user']['allow_view_source'] = true;
$conf['server']['server_list'] = 'none';
$conf['compose']['use_vfs'] = true;
$conf['compose']['link_attachments_notify'] = true;
$conf['compose']['link_attach_threshold'] = 0;
$conf['compose']['link_attach_size_limit'] = 0;
$conf['compose']['link_attach_size_hard'] = 0;
$conf['compose']['link_attachments'] = true;
$conf['compose']['attach_size_limit'] = 0;
$conf['compose']['attach_count_limit'] = 5;
$conf['compose']['reply_limit'] = 200000;
$conf['compose']['ac_threshold'] = 3;
$conf['compose']['htmlsig_img_size'] = 30000;
$conf['pgp']['keylength'] = 0;
$conf['maillog']['driver'] = 'history';
$conf['sentmail']['driver'] = 'Null';
$conf['contactsimage']['backends'] = 
array('IMP_Contacts_Avatar_Addressbook');
$conf['tasklist']['use_tasklist'] = true;
$conf['notepad']['use_notepad'] = true;
/* CONFIG END. DO NOT CHANGE ANYTHING IN OR BEFORE THIS LINE. */
~
I'm disperate!!!

Thank you.

Pasquale (from Italy).