Async not stopping in code when task was end

HI ,

Im using the following code in a-sync and the problem is that after i get the data (from the GetUsersData();) 

the screen is invoked and the code is not reach to the isServiceValid,how can I change it that the 

code after the task will be called also,when I put break-point on the code after the task its not stopped...

        Task.Factory.StartNew(() =>
        {
            //-----get service Data ---------
            try
                {

                 GetUsersData();

                }
            catch (Exception e)
                {
                _isValid = false;
                ThrowErrorMessage(e.Message);
                }
        })
         .ContinueWith((task) =>
         {

                Mouse.OverrideCursor = null;
      


          

         }, System.Threading.CancellationToken.None, TaskContinuationOptions.None, TaskScheduler.FromCurrentSynchronizationContext());
isServiceValid = true;