Prevent deadlock issue with WCF duplex callback service

I have a problem with a self-hosted wcf duplex callback service. I get an InvalidOperationException with message:

This operation would deadlock because the reply cannot be received until the current message completes processing. If you want to allow out-of-order message processing, specify ConcurrencyMode of Reentrant or Multiple on CallbackBehaviorAttribute.

Here is my service behavior:

[ServiceBehavior(InstanceContextMode = InstanceContextMode.Single, ConcurrencyMode =  ConcurrencyMode.Reentrant, UseSynchronizationContext = true)]

Here is my service contract:

 [ServiceContract(SessionMode = SessionMode.Required, CallbackContract = typeof(IClientCallback))]

[ServiceContract]
public interface IClientToService
{
    [OperationContract(IsOneWay = false)]
    LVSSStatus GetLvssStatus();

    [OperationContract(IsOneWay = true)]
    void PickSpecimen(long trackingNumber, int destCode);

    [OperationContract(IsOneWay = true)]
    void CancelCurrentPickTransaction();
}

Here is my callback interface:

public interface ILvssClientCallback
{
    [OperationContract(IsOneWay = true)]
    void SendClientCallback(LvssCallbackMessage callbackMessage);

    [OperationContract(IsOneWay = false)]
    List<SpecimenTemplateDescriptor> GetTemplateDescriptorList(DrawerLayout drawerLayout);

    [OperationContract(IsOneWay = false)]
    SpecimenTemplate SelectSpecimenTemplate(string templateName, int version);

    [OperationContract]
    void SpecimenStoredInContainer(string containerID, bool isValidRackID, int rackRow, int rackCol, int deckRow, int deckCol,
     int drawerRow, int drawerCol, long trackingNumber, RobotErrors robotError);

    [OperationContract]
    void LvssRobotStatusChange(LVSSStatus status);
}

I understand that the InvalidOperationException is caused when a callback operation is