[courier-users] cannot create mail folder

[Lee Ming]

Hello..   I got some problem about courierimap..I am using qmail 1.03, vmailmgr on redhat linux 7.0. I can login the imap server, but cannot create any folder, it always said "NO Invalid mailbox name" The following are some of my imapd configure   AUTHMODULES="authvmailmgr authpam"   IMAP_CAPABILITY="IMAP4rev1 CHILDREN NAMESPACE THREAD=ORDEREDSUBJECT THREAD=REFERENCES SORT"   But when I login to see the capability :   * OK Courier-IMAP ready. Copyright 1998-2001 Double Precision, Inc.  See COPYING for distribution information. 1 login [EMAIL PROTECTED] passwd 1 OK LOGIN Ok. 2 capability * CAPABILITY IMAP4rev1 2 OK CAPABILITY completed 3 create test 3 NO Invalid mailbox name   The CAPABILITY only have IMAP4rev1, it is correct??   Any body can help, I try courier-imap for serverl months but still got problem cannot fix...   Thx.