Hive slave tray icon loses connection after recovering from sleep

[abeham]

When recovering the operating system (Windows 7) from sleep, the tray icon cannot correctly communicate with the service anymore. I tried clicking the pause button and received following exception:

15.01.2012 14:42:22	Error sending core to sleep: System.ServiceModel.CommunicationObjectFaultedException: The communication object, System.ServiceModel.Channels.ServiceChannel, cannot be used for communication because it is in the Faulted state.

Server stack trace: 
   at System.ServiceModel.Channels.CommunicationObject.ThrowIfDisposedOrNotOpen()
   at System.ServiceModel.Channels.ServiceChannel.Call(String action, Boolean oneway, ProxyOperationRuntime operation, Object[] ins, Object[] outs, TimeSpan timeout)
   at System.ServiceModel.Channels.ServiceChannelProxy.InvokeService(IMethodCallMessage methodCall, ProxyOperationRuntime operation)
   at System.ServiceModel.Channels.ServiceChannelProxy.Invoke(IMessage message)

Exception rethrown at [0]: 
   at System.Runtime.Remoting.Proxies.RealProxy.HandleReturnMessage(IMessage reqMsg, IMessage retMsg)
   at System.Runtime.Remoting.Proxies.RealProxy.PrivateInvoke(MessageData& msgData, Int32 type)
   at HeuristicLab.Clients.Hive.SlaveCore.ServiceContracts.ISlaveCommunication.Sleep()
   at HeuristicLab.Clients.Hive.SlaveCore.Views.SlaveItem.Sleep()