django-viewflow signal to work with a djangosignal

Question

I'm trying to set a viewflow.Signal to work with a django.signal but I just cannot. I've followed the examples included in the documentation but it just keeps failing: viewflow.Signal

anyone knows how to set the set the receiver and the task_loader

---

I use a django signal to trigger the signal task :

class FlowReg (Flow):
    start = ()
    enabled_signal = (
       flow.Signal(
       node_validation_signal, 
       receipt_created,
       task_loader = this.get_task).Next(this.join_val_tasks))

    def get_task(self, flow_task,  **kwargs):
        proc_id = kwargs['id']
        proc_to_work = self.__class__.process_class.objects.get(node_process=proc_id)
        task_to_return = proc_to_work.get_task(FlowReg.enabled_signal)
        return task_to_return

and I don't know how to do it to not use task_loader