[PHP] need your help

[Waty]

Hi,

i got error when open the imap:
my code : 

$mail_server = "172.0.0.1";
$mail_port = "143";
$utg_box =1;
$mail_id = "username";
$mail_pass = "password";

$open_mail_box = "{".$mail_server.":".$mail_port."}INBOX.".$utf_box;
$mbox = imap_open($open_mail_box, $mail_id, $mail_pass);

error:
    Couldn't open stream {172.0.0.1:143}INBOX.1 

Please help.... thanks a lot

Regards
Waty