pass value to wf_event_t

HI ,

We  have subscribed a custom function to the standard business event 'oracle.apps.ap.supplier.event'  .

This custom function which we have subscribed to this event just inserts records a cutome table .

Now due to some reason , this business event is not getting triggered , so we want to debug this by passing the parameters v  value to the

wf_event_t   but it is not getting executed :

Our Custome function is :-

FUNCTION process_business_event(p_subscription_guid IN raw,

                                  p_event             IN OUT nocopy wf_event_t)

    RETURN VARCHAR2 IS

    l_business_event_name   wf_events.name%type DEFAULT NULL;