While attempting to Distribute and install Update Services Signing Certificate - selecting certificate from WSUS Server ( server in drop down ) I receive the following error when clicking distribute:

clicking show details I receive the extra following information:
Stack: at EminentWare.DataGridServer.Executive.SessionManager.ExistsWithIntegrityCheck(Guid sessionid, String textualsid, String ipaddress)
at EminentWare.DataGridServer.Executive.TaskManager.AddTask(SubmitTaskInfo sti)
at EminentWare.DataGridServer.Executive.TaskManagerInterfaceImplementation.EminentWare.DataGridServer.Interface.IDataGridServerInternal.SubmitTask(SubmitTaskInfo sti)
at EminentWare.BusinessObjectLayer.DataGridServerClientInterfaceImplementation.SubmitTask(SubmitTaskInfo sti)
at EminentWare.BusinessObjectLayer.TaskObject.RunTaskCommand.DataPortal_Execute()
at Csla.MethodCaller.CallMethod(Object obj, MethodInfo info, Object[] parameters)
at Csla.MethodCaller.CallMethod(Object obj, String method, Object[] parameters)
at Csla.Server.SimpleDataPortal.Update(Object obj, DataPortalContext context)
at Csla.DataPortal.Update(Object obj)
at Csla.DataPortal.Update[T](T obj)
at Csla.DataPortal.Execute[T](T obj)
at EminentWare.BusinessObjectLayer.TaskObject.RunTask(Criteria taskcriteria)
at EminentWare.BusinessObjects.TaskBroker.SynchronousTask.ExecuteAndPullResultsFile(ITaskExecutionCallback callback)
at EminentWare.BusinessObjects.TaskBroker.SynchronousTask.Execute()
at EminentWare.UI.MMC.Controls.UpdateServerConfiguration.RetrieveServerInformation(UpdateServerConfiguration config)