Updating label with data from thread

Question

I am trying to update a label in windows forms. The action is happening in a separate class but while the action is happening on a separate class. The label should be updated, but things seem to be not working. Kindly assist

Below is the Back code of the form ProcessingUI

public partial class ProcessingUI : Form
{
    private void start_Click(object sender, EventArgs e)
    {
        StartProcessingTask();
    }

     private void StartProcessingTask()
    {
        if (_isRunning)
            return;

        _isRunning = true;

        _taskToken = new CancellationTokenSource();

            Task.Factory.StartNew(() =>
            {
                while (_isRunning)
                {

                    var data = _processing.Processdata(lblCounter, _taskToken);
                    if (data.Success)
                        _isRunning = false;
                    if (_taskToken.IsCancellationRequested)
                        return;
                }

            });

    }

    public delegate void SetStatusCallback(string message);
    public void UpdateStatus(string message)
    {
        if (this.lblCounter.InvokeRequired)
        {

            this.Invoke(new SetStatusCallback(UpdateStatus),
                 message);
        }
        else
            this.lblCounter.Text = message;
    }
}

Then here is a separate class that has the action, basically its just updating. Now on update I just want to pass the record that is being updated. So i call the Method from the form and use it in this class.

public class Processing
   {
        public Results Processdata(CancellationTokenSource taskToken)
       {
       foreach (var record in dataCases)
               {
          //Doing other things here like updating
            new ProcessingUI().UpdateStatus(record.RequestReference);//This is the method I am calling from the form.
           }

       }
   }