[binc] CREATE failed: With a Maildir++

hello :)

i have some problems with bincimap.

my config :

Mailbox {
    depot = "Maildir++",


    //depot = "IMAPdir",
    type = "Maildir",                           
    path = "Maildir",                              

    auto create inbox = "yes",                     
    auto subscribe mailboxes = "INBOX",          
    umask = "077"                                 
}

this conf for my webmail (horde)
$servers['imap'] = array(
    'name' => 'IMAP Server',
    'server' => 'localhost',
    'hordeauth' => true,
    'protocol' => 'imap',
    'port' => 143,
    'folders' => '',
    'namespace' => '',
    'maildomain' => '',



Trying 127.0.0.1...
Connected to localhost.
Escape character is '^]'.
* OK Welcome to Binc IMAP Copyright (C) 2002-2005 Andreas Aardal Hanssen at 2005-08-21 18:15:16 CEST
a login gilles@.... xxxxxxx
a OK LOGIN completed
a list "" *
* LIST (\Unmarked) "/" "INBOX"
* LIST (\Unmarked) "/" "INBOX/Drafts"
* LIST (\Unmarked) "/" "INBOX/Sent"
* LIST (\Unmarked) "/" "INBOX/Trash"
* LIST (\Unmarked) "/" "INBOX/sent-mail"
a OK LIST completed


error :

for exemple when i want delete mail :

The folder ".Trash" was not created. This is what the server said:
CREATE failed: With a Maildir++ depot, you must create all mailboxes
under INBOX. Try creating INBOX/.Trash.


thsi folder exist , .bincimap-susbscribed is ok.
INBOX
INBOX/Drafts
INBOX/Sent
INBOX/sent-mail
INBOX/Trash


do you have any idea? 

thks a lot :)

gilles.