Please help me with imapsync.

Old Server : Kerio Mail Server
New Server : Zimbra ZCS-7.1.0_GA_3140.UBUNTU10_64

When i try to imapsync , i did successfully for a few times with some accounts, but after changing the zimbraFileUploadMaxSize it gives me an error:

Code:
++++ Listing folders ++++
From folders list: [Avizari Ghighiu] [Deleted Items] [Drafts] [INBOX] [Junk E-mail] [Public Folders/IT] [Public Folders/Structura organizatorica] [Reparate DARC] [Repartizare defecte] [Repatriere vagoane] [Sent Items]
To   folders list: [Avizari Ghighiu] [Chats] [Contacts] [Drafts] [Emailed Contacts] [INBOX] [Junk] [Sent] [Trash]
++++ Looping on each folder ++++
From Folder [Avizari Ghighiu]
To   Folder [Avizari Ghighiu]
++++ From [Avizari Ghighiu] Parse 1 ++++
++++ To   [Avizari Ghighiu] Parse 1 ++++
++++ Verifying [Avizari Ghighiu] -> [Avizari Ghighiu] ++++
+ NO msg #1 [fP0oW3Fg/H8CgC6hM4MkKA:26983] in Avizari Ghighiu
+ Copying msg #1:26983 to folder Avizari Ghighiu
flags from: [\Seen]["27-Sep-2011 15:35:31 +0200"]
Couldn't append msg #1 (Subject:[Avizare manevra Ghighiu]) to folder Avizari Ghighiu: 25 NO maximum message size exceeded
+ NO msg #2 [/qgsGhYCsNamNlTEE64S/Q:1162] in Avizari Ghighiu
+ Copying msg #2:1162 to folder Avizari Ghighiu
flags from: [\Seen]["27-Sep-2011 14:19:23 +0200"]
Couldn't append msg #2 (Subject:[Fw: Avizare manevra Ghighiu]) to folder Avizari Ghighiu: 26 NO maximum message size exceeded
+ NO msg #3 [PJJEEPzDkgdnutICYUYbVw:16163] in Avizari Ghighiu
+ Copying msg #3:16163 to folder Avizari Ghighiu
flags from: [\Seen]["27-Sep-2011 13:56:53 +0200"]
Couldn't append msg #3 (Subject:[Avizare manevra Ghighiu]) to folder Avizari Ghighiu: 27 NO maximum message size exceeded
+ NO msg #4 [RH5gvtTuhUb2zIVJ303ogA:716] in Avizari Ghighiu
+ Copying msg #4:716 to folder Avizari Ghighiu
flags from: [\Seen $Forwarded]["27-Sep-2011 10:48:40 +0200"]
Couldn't append msg #4 (Subject:[Avizare manevra Ghighiu]) to folder Avizari Ghighiu: 28 NO maximum message size exceeded
+ NO msg #5 [hqlQO2Fwf6uLP3WoMWWgXw:556701] in Avizari Ghighiu
+ Copying msg #5:556701 to folder Avizari Ghighiu
flags from: [\Seen]["27-Sep-2011 07:39:24 +0200"]
Couldn't append msg #5 (Subject:[Avizare manevra Ghighiu]) to folder Avizari Ghighiu: 29 NO maximum message size exceeded
+ NO msg #6 [IPiBN8nDlPedKsfweRnm4w:20922] in Avizari Ghighiu
+ Copying msg #6:20922 to folder Avizari Ghighiu
flags from: [\Seen]["26-Sep-2011 16:31:09 +0200"]
Couldn't append msg #6 (Subject:[Fw: Avizare manevra Ghighiu]) to folder Avizari Ghighiu: Error sending '30 APPEND "Avizari Ghighiu" (\Seen) "26-Sep-2011 16:31:09 +0200" {20922}': * BYE mbox.grampet.com Zimbra IMAP4rev1 server closing connection
+ NO msg #7 [v8cww6qvMLnHTEP9cjxjYQ:916] in Avizari Ghighiu
+ Copying msg #7:916 to folder Avizari Ghighiu
++++ End looping on each folder ++++
error: lost connection (to) host2 [93.114.80.10](len=155) Error sending '30 APPEND "Avizari Ghighiu" (\Seen) "26-Sep-2011 ... BYE mbox.grampet.com Zimbra IMAP4rev1 server closing connection
++++ Statistics ++++
Time                   : 3 sec
Messages transferred   : 0
Messages skipped       : 0
Total bytes transferred: 0
Total bytes skipped    : 0
Total bytes error      : 622647
Detected 7 errors

My mailbox.log shows :

Code:
2011-11-25 11:21:00,154 INFO  [ImapSSLServer-1] [ip=93.114.80.10;] cache - initializing folder and tag caches for mailbox 9
2011-11-25 11:21:00,224 INFO  [ImapSSLServer-1] [ip=93.114.80.10;] mbxmgr - Mailbox 9 account 6615be20-6d2f-4f1e-9da2-dd52b17b7566 LOADED
2011-11-25 11:21:00,224 INFO  [ImapSSLServer-1] [name=vivi.ivan@gfr.ro;ip=93.114.80.10;] imap - user vivi.ivan@gfr.ro authenticated, mechanism=PLAIN [TLS]
2011-11-25 11:21:01,338 INFO  [ImapSSLServer-1] [name=vivi.ivan@gfr.ro;ip=93.114.80.10;] imap - selected folder Avizari Ghighiu
2011-11-25 11:21:01,340 INFO  [ImapSSLServer-1] [name=vivi.ivan@gfr.ro;mid=9;ip=93.114.80.10;] imap - STATUS failed: no such folder: Deleted Items
2011-11-25 11:21:01,356 INFO  [ImapSSLServer-1] [name=vivi.ivan@gfr.ro;mid=9;ip=93.114.80.10;] imap - selected folder Drafts
2011-11-25 11:21:01,360 INFO  [ImapSSLServer-1] [name=vivi.ivan@gfr.ro;mid=9;ip=93.114.80.10;] imap - selected folder INBOX
2011-11-25 11:21:01,361 INFO  [ImapSSLServer-1] [name=vivi.ivan@gfr.ro;mid=9;ip=93.114.80.10;] imap - STATUS failed: no such folder: Junk E-mail
2011-11-25 11:21:01,362 INFO  [ImapSSLServer-1] [name=vivi.ivan@gfr.ro;mid=9;ip=93.114.80.10;] imap - STATUS failed: no such folder: Public Folders/IT
2011-11-25 11:21:01,364 INFO  [ImapSSLServer-1] [name=vivi.ivan@gfr.ro;mid=9;ip=93.114.80.10;] imap - STATUS failed: no such folder: Public Folders/Structura organizatorica
2011-11-25 11:21:01,365 INFO  [ImapSSLServer-1] [name=vivi.ivan@gfr.ro;mid=9;ip=93.114.80.10;] imap - STATUS failed: no such folder: Reparate DARC
2011-11-25 11:21:01,366 INFO  [ImapSSLServer-1] [name=vivi.ivan@gfr.ro;mid=9;ip=93.114.80.10;] imap - STATUS failed: no such folder: Repartizare defecte
2011-11-25 11:21:01,367 INFO  [ImapSSLServer-1] [name=vivi.ivan@gfr.ro;mid=9;ip=93.114.80.10;] imap - STATUS failed: no such folder: Repatriere vagoane
2011-11-25 11:21:01,368 INFO  [ImapSSLServer-1] [name=vivi.ivan@gfr.ro;mid=9;ip=93.114.80.10;] imap - STATUS failed: no such folder: Sent Items
2011-11-25 11:21:01,477 INFO  [ImapSSLServer-1] [name=vivi.ivan@gfr.ro;mid=9;ip=93.114.80.10;] imap - selected folder Avizari Ghighiu
2011-11-25 11:21:02,083 INFO  [ImapSSLServer-1] [] imap - dropping connection for user vivi.ivan@gfr.ro (server-initiated)
2011-11-25 11:21:02,084 INFO  [ImapSSLServer-1] [] ProtocolHandler - Handler exiting normally

I changed the max message size limit, the max imap connections , etc , ulimit, but nothing of theese forums helped. I still have the error :

"error: lost connection (to) host2 [93.114.80.10](len=155) Error sending '30 APPEND "Avizari Ghighiu" (\Seen) "26-Sep-2011 ... BYE mbox.grampet.com Zimbra IMAP4rev1 server closing connection"

Please anyone can help ? It's a bit urgent.