My Yahoo! account is set up but after giving me my contact, calendar and inbox data quite nicely, my yahoo folders just sit there and I get a red-dot exclamation. When I click it leads me to the message: "Failure communicating with remote server. Please try again later."

So there is no folder synching going on.

---

Here is the error code:
Debug message: Unexpected end of stream

Exception:

com.zimbra.common.service.ServiceException: system failure: Synchronization of folder '/Personal - Studies' failed
ExceptionId:btpool0-17:1244316798526:a719439f0be0fbd4
Code:service.FAILURE
at com.zimbra.common.service.ServiceException.FAILURE (ServiceException.java:253)
at com.zimbra.cs.datasource.ImapSync.syncFailed(ImapS ync.java:298)
at com.zimbra.cs.datasource.ImapSync.syncMessages(Ima pSync.java:260)
at com.zimbra.cs.datasource.ImapSync.syncFolders(Imap Sync.java:195)
at com.zimbra.cs.datasource.ImapSync.importData(ImapS ync.java:152)
at com.zimbra.cs.offline.OfflineImport.importData(Off lineImport.java:88)
at com.zimbra.cs.offline.YMailImport.importData(YMail Import.java:53)
at com.zimbra.cs.datasource.DataSourceManager.importD ata(DataSourceManager.java:154)
at com.zimbra.cs.mailbox.LocalMailbox.importData(Loca lMailbox.java:417)
at com.zimbra.cs.mailbox.LocalMailbox.syncAllLocalDat aSources(LocalMailbox.java:389)
at com.zimbra.cs.mailbox.LocalMailbox.sync(LocalMailb ox.java:431)
at com.zimbra.cs.service.offline.OfflineSync.handle(O fflineSync.java:49)
at com.zimbra.soap.SoapEngine.dispatchRequest(SoapEng ine.java:429)
at com.zimbra.soap.SoapEngine.dispatch(SoapEngine.jav a:286)
at com.zimbra.soap.SoapEngine.dispatch(SoapEngine.jav a:160)
at com.zimbra.soap.SoapServlet.doPost(SoapServlet.jav a:275)
at javax.servlet.http.HttpServlet.service(HttpServlet .java:727)
at com.zimbra.cs.servlet.ZimbraServlet.service(Zimbra Servlet.java:190)
at javax.servlet.http.HttpServlet.service(HttpServlet .java:820)
at org.mortbay.jetty.servlet.ServletHolder.handle(Ser vletHolder.java:487)
at org.mortbay.jetty.servlet.ServletHandler.handle(Se rvletHandler.java:362)
at org.mortbay.jetty.security.SecurityHandler.handle( SecurityHandler.java:216)
at org.mortbay.jetty.servlet.SessionHandler.handle(Se ssionHandler.java:181)
at org.mortbay.jetty.handler.ContextHandler.handle(Co ntextHandler.java:716)
at org.mortbay.jetty.webapp.WebAppContext.handle(WebA ppContext.java:406)
at org.mortbay.jetty.handler.ContextHandlerCollection .handle(ContextHandlerCollection.java:211)
at org.mortbay.jetty.handler.HandlerCollection.handle (HandlerCollection.java:114)
at org.mortbay.jetty.handler.HandlerWrapper.handle(Ha ndlerWrapper.java:139)
at org.mortbay.jetty.handler.RewriteHandler.handle(Re writeHandler.java:176)
at org.mortbay.jetty.handler.HandlerWrapper.handle(Ha ndlerWrapper.java:139)
at org.mortbay.jetty.Server.handle(Server.java:313)
at org.mortbay.jetty.HttpConnection.handleRequest(Htt pConnection.java:506)
at org.mortbay.jetty.HttpConnection$RequestHandler.co ntent(HttpConnection.java:844)
at org.mortbay.jetty.HttpParser.parseNext(HttpParser. java:644)
at org.mortbay.jetty.HttpParser.parseAvailable(HttpPa rser.java:211)
at org.mortbay.jetty.HttpConnection.handle(HttpConnec tion.java:381)
at org.mortbay.io.nio.SelectChannelEndPoint.run(Selec tChannelEndPoint.java:396)
at org.mortbay.thread.BoundedThreadPool$PoolThread.ru n(BoundedThreadPool.java:442)
Caused by: java.io.EOFException: Unexpected end of stream
at com.zimbra.cs.mailclient.MailInputStream.peekChar( MailInputStream.java:128)
at com.zimbra.cs.mailclient.imap.ImapInputStream.read Text(ImapInputStream.java:225)
at com.zimbra.cs.mailclient.imap.ImapResponse.readRes ponse(ImapResponse.java:48)
at com.zimbra.cs.mailclient.imap.ImapResponse.read(Im apResponse.java:41)
at com.zimbra.cs.mailclient.imap.ImapConnection.readR esponse(ImapConnection.java:628)
at com.zimbra.cs.mailclient.imap.ImapConnection.nextR esponse(ImapConnection.java:622)
at com.zimbra.cs.mailclient.imap.ImapConnection.waitF orResponse(ImapConnection.java:541)
at com.zimbra.cs.mailclient.imap.ImapConnection.sendR equest(ImapConnection.java:475)
at com.zimbra.cs.mailclient.imap.ImapRequest.send(Ima pRequest.java:77)
at com.zimbra.cs.mailclient.imap.ImapRequest.sendChec kStatus(ImapRequest.java:81)
at com.zimbra.cs.mailclient.imap.ImapConnection.uidFe tch(ImapConnection.java:297)
at com.zimbra.cs.datasource.ImapFolderSync.fetchMessa ges(ImapFolderSync.java:927)
at com.zimbra.cs.datasource.ImapFolderSync.fetchMessa ges(ImapFolderSync.java:862)
at com.zimbra.cs.datasource.ImapFolderSync.fetchMessa ges(ImapFolderSync.java:851)
at com.zimbra.cs.datasource.ImapFolderSync.syncMessag es(ImapFolderSync.java:243)
at com.zimbra.cs.datasource.ImapSync.syncMessages(Ima pSync.java:257)
... 35 more

If issue persists please post description and debug information here.