[imp] Dovecot and IMP

[Manilal K M]

Hi all,
   I have recently upgraded from Courier-IMAP to dovecot.
But now when I use IMP to view my mailbox, the folders are not shown.
Only the  INBOX is shown. I am using dovecot-1.0-0_20 , Horde-3.2  and
IMP-4.2
How can I get all the mail folders. Please help , this is something urgent.
The imp/config/servers.php is as follows:
$servers['imap'] = array(
    'name' => 'foobar IMAP Server',
    'server' => 'localhost',
    'hordeauth' => 'full',
    'protocol' => 'imap/ssl/novalidate-cert',
    'port' => 993,
    'maildomain' => 'foobar.com',
    'smtphost' => 'localhost',
    'smtpport' => 25,
    'realm' => '',
    'preferred' => '',
    'dotfiles' => false
);

Thanks in advance
manilal