There was an error report in the error report folder of desktop client

Product name: Zimbra Desktop
Product version: 7.0.1Build ID: 10791.Release type: GAOS Platform: Windows 7 x86 6.1Time of event: 2011-10-17 17:09:35Error type: service.PROXY_ERRORItem ID: 1Error summary: Sync failed due to IOException for the following itemsItems will be retried on next syncItem Id: 3408 Message: PushChanges.sync

Zimbra server:6.0.6