Who's used imap function in PHP4?

[Anon]

Who's used imap function in PHP4?
Recently I upgraded my PHP to 4. But I find I cant use imap functions, such as imap_open().
error msg:
Parse error: parse error, expecting `'}'' in C:\Inetpub\wwwroot\mail2\maillist.php on line 38
who can tell my why? Thank U.

[Anon]

<?
$mbox = imap_open("{sa.ust.edu.cn/pop3:110}INBOX","$uid","$psd",CL_EXPUNGE);
$num=imap_num_msg($mbox);

$structe=imap_fetchstructure($mbox,$num,FT_UID); <---some error in this line

?>

[Anon]

PHP4.0.0 in Win32?
I'm prepared to change platform .