BPM HTTP Sync -> IDOC Async Timeout

Hi!!!

my scenary is using a BPM

HTTP sync <--> BPM -> IDOC

my IP

receiver            sender1             transforme              sender2
--------            --------            -------------           --------
SI_ABS_SYNC         SI_ABS_REQ          OM_ABS_REQ_to_ABS_RES   SI_ABS_RES
SI_ABS_REQ                              SI_ABS_REQ              Close S/A Bridge
Open S/A Bridge                         SI_ABS_RES
                                        Create New Transaction
--------            --------            -------------           --------
HTTP                IDOC                Mapping                 HTTP_Response
->                  ->                  ->                      <-
->                                                              <-

the steps the BPM pass

receiver -ok

sender1 -ok

tranformer -ok

sernder2 - mistake

could you help me, what i need to move or configurate to return the response message

the tranformer is a Mapping with return a ID that it is in the request message, i simple sent to return

Levy Gonzalez