[Phpgroupware-developers] Warning: imap_open()

[佐本達義]

Hello, I'm Japanese. 

When I click on "E-Mail preferences", Output the errors as follows:

●page header
Warning: imap_open(): Couldn't open stream {:143}INBOX in 
/home/httpd/html/phpgroupware/email/inc/class.mail_dcom_imap.inc.php on line 
214 

Warning: imap_open(): Couldn't open stream {:143/imap/notls}INBOX in 
/home/httpd/html/phpgroupware/email/inc/class.mail_dcom_imap.inc.php on line 214

●page center
source: email class.mail_msg_base.inc.php 

called from: /phpgroupware/index.php, mail_msg: ensure_stream_and_folder(), 
called_from: from mail_msg_base: loginerr_tryagain_buggy_cert FOR 
/phpgroupware/index.php, msg_bootstrap: ensure_mail_msg_exists(), called_by: 
email.boindex.index_data LINE 353 

imap_last_error: [Can't open mailbox INBOX: invalid remote specification] 
tried RH bug recovery?: [1]


this architecher is as follows:

OS : Redhat Linux 9.0 

phpgroupware-0.9.16.005 
Apache2.0.54 
php-4.4.0 
MySQL-4.1.13 
openssl-0.9.8 
ucspi-tcp-0.88 
qmail-1.03 
courier-imap-4.0.4


Please tell me this problem solution.

Regards,
samotty