Hi guy, i have a problem with Zimbra Desktop about client sync. Zimbra, have a red X on accont. Any sent message, is persistent on outbox and is sent with senad-and-receive button is pressed. Debug error reported is :

Messaggio di debug: invalid request: empty/missing item ID

Eccezione:

com.zimbra.common.soap.SoapFaultException: invalid request: empty/missing item ID
ExceptionId:qtp1044962984-219933:https://192.168.1.252:443/service/so...9c66bbca30310f
Code:service.INVALID_REQUEST
at com.zimbra.common.soap.Soap12Protocol.soapFault(So ap12Protocol.java:88)
at com.zimbra.common.soap.SoapTransport.extractBodyEl ement(SoapTransport.java:354)
at com.zimbra.common.soap.SoapTransport.parseSoapResp onse(SoapTransport.java:313)
at com.zimbra.common.soap.SoapHttpTransport.invoke(So apHttpTransport.java:260)
at com.zimbra.common.soap.SoapHttpTransport.invoke(So apHttpTransport.java:164)
at com.zimbra.common.soap.SoapTransport.invoke(SoapTr ansport.java:407)
at com.zimbra.common.soap.SoapTransport.invokeWithout Session(SoapTransport.java:393)
at com.zimbra.cs.mailbox.ZcsMailbox.sendRequest(ZcsMa ilbox.java:678)
at com.zimbra.cs.mailbox.ZcsMailbox.sendRequest(ZcsMa ilbox.java:640)
at com.zimbra.cs.mailbox.ZcsMailbox.sendRequest(ZcsMa ilbox.java:635)
at com.zimbra.cs.mailbox.ZcsMailbox.sendRequest(ZcsMa ilbox.java:628)
at com.zimbra.cs.mailbox.ZcsMailbox.sendRequest(ZcsMa ilbox.java:624)
at com.zimbra.cs.mailbox.ZcsMailbox.sendRequest(ZcsMa ilbox.java:620)
at com.zimbra.cs.mailbox.ZcsMailbox.sendRequest(ZcsMa ilbox.java:616)
at com.zimbra.cs.mailbox.PushChanges.sync(PushChanges .java:232)
at com.zimbra.cs.mailbox.PushChanges.sync(PushChanges .java:195)
at com.zimbra.cs.mailbox.MailboxSync.sync(MailboxSync .java:193)
at com.zimbra.cs.mailbox.ZcsMailbox.sync(ZcsMailbox.j ava:124)
at com.zimbra.cs.mailbox.ZcsMailbox.syncOnTimer(ZcsMa ilbox.java:105)
at com.zimbra.cs.mailbox.SyncMailbox$1.run(SyncMailbo x.java:279)
at java.util.TimerThread.mainLoop(Unknown Source)
at java.util.TimerThread.run(Unknown Source)

Any idea ?