[sr-dev] problem with locally generated ACKs

i noticed that if sr sends a locally generated INVITE (as result of tm.t_uac_wait), the INVITE gets processes by my event_route [tm:local-request] script, but when UA responds with 200 OK, the ACK generated by sr does not get processed by the event_route and if the UA is behind nat, the UA never gets the ACK it because sr tries to send it to local address of the UA. how can i get sr to use the above event route also for locally generated ACKs so that i can properly rewrite r-uri of the ACK? -- juha