can't subscribe to IMAP folder after syncing it from another server

[lkolchin at univ.haifa.ac.il]

Hello All,
 
I've installed Cyrus-IMAP with users on MySQL DB on SLES 9 and everything is working fine except the following.
Users connecting to my server using several e-mail clients and external Horde IMP (it is on another server managed by another person).
For some users, I've synced their folders created by Horde IMP on another server with UW-IMAP running on it, with their accounts on my Cyrus-IMAP server.
I did the syncronization with the imapsync utility (http://www.linux-france.org/prj/imapsync/).
 
The problem is that I can't subscribe to these folders (synced from another server) but I can use them via Horde IMP web interface.
When I try to subscribe to these folders (folder 'mail for example) via OE (Outlook Express) I get "Could not show 'mail'. The server refused to show it. The folder might already be shown."
And the details show:
Subscribe: Mailbox does not exist
 
Configuration:
   Account: testuser3 at myserver.com
   Server: mail2.myserver.com
   User name: testuser3
   Protocol: IMAP
   Port: 143
   Secure(SSL): 0
   Code: 800cccd2
 
But the mailbox exist and I can see it, this is the listing:
 
drwx------   2 cyrus mail 144 Sep 11 12:35 Drafts
drwx------   2 cyrus mail 144 Sep 11 13:11 INBOX^Drafts
drwx------   2 cyrus mail 144 Sep 11 13:11 INBOX^Sent
drwx------   2 cyrus mail 144 Sep 11 13:11 INBOX^Trash
drwx------   2 cyrus mail 144 Sep 11 12:35 Sent Items
-rw-------   1 cyrus mail   4 Sep 11 13:12 cyrus.cache
-rw-------   1 cyrus mail 185 Sep 11 12:16 cyrus.header
-rw-------   1 cyrus mail  76 Sep 11 13:12 cyrus.index
drwx------   3 cyrus mail 168 Sep 12 15:02 hadash
drwx------   4 cyrus mail 120 Sep 11 12:43 mail
drwx------   3 cyrus mail 248 Sep 11 14:38 new
drwx------   3 cyrus mail  72 Sep 11 12:41 test
 
And its testuser3.sub looks like:

user.testuser3
user.testuser3.Drafts
user.testuser3.INBOX^Drafts
user.testuser3.INBOX^Sent
user.testuser3.INBOX^Trash
user.testuser3.Sent Items
user.testuser3.new
user.testuser3.new.son_of_new
user.testuser3.test.new

Below is the listing from another account. I've created there 'mail' folder via OE (didn't synced it from another server) and its permissions seems similar to permissions of 'mail' folder above, and I can see it in the OE:

-rw-------   1 cyrus mail 849927 Sep 12 15:18 2.
drwx------   2 cyrus mail    144 Sep 12 15:16 Drafts
drwx------   2 cyrus mail    144 Sep 12 15:16 Sent Items
-rw-------   1 cyrus mail   1664 Sep 12 15:19 cyrus.cache
-rw-------   1 cyrus mail    185 Sep 12 15:12 cyrus.header
-rw-------   1 cyrus mail    136 Sep 12 15:19 cyrus.index
drwx------   2 cyrus mail    144 Sep 12 15:13 mail
drwx------   3 cyrus mail    168 Sep 12 15:13 mail2
 
And its testuser4.sub looks like:

user.testuser4
user.testuser4.Drafts
user.testuser4.Sent Items
user.testuser4.mail
user.testuser4.mail2
user.testuser4.mail2.mail22

 
What is the reason for this strange behavior and how to solve it?

 
Best Regards,
Leon Kolchinsky
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