bot not responding

2015-06-08 17:14:48,940 [1] INFO Logger (null) - [BotManager] MsBetweenTicks = 15
2015-06-08 17:14:49,186 [1] INFO Logger (null) - Hearthbuddy [0.3.978.152] is up to date!
2015-06-08 17:14:50,444 [1] DEBUG Logger (null) - System.Reflection.TargetInvocationException: Exception has been thrown by the target of an invocation. ---> 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 Buddy.Auth.SR.IA.Do(Byte b, Object[] args)
at ..Do(Byte , Object[] ˆ)
--- End of inner exception stack trace ---
at System.RuntimeMethodHandle.InvokeMethod(Object target, Object[] arguments, Signature sig, Boolean constructor)
at System.Reflection.RuntimeMethodInfo.UnsafeInvokeInternal(Object obj, Object[] parameters, Object[] arguments)
at System.Reflection.RuntimeMethodInfo.Invoke(Object obj, BindingFlags invokeAttr, Binder binder, Object[] parameters, CultureInfo culture)
at You.Proxy._c_0_d_1(Object s, String n, Byte o, Object[] a)
at ?..fc7b110dca35( , Object[] )
at ?..?(String , Byte , Int64 ?)
at .?.?.?( )


where is problem ?