Electronic Bank Statement EBS

we are facing a problem while uploading EBS statement format txt file foreign exchange gain loss account is not coming.

Scenario:- i have posted an invoice 1000 gbp forex rate 73 inr we are making payment after 15 days at DAT time assume exchange rate is 75 INR so while running APP system is picking all the relevant G.L account including gain loss also ideally my loss is 2000inr which have been posted but when bank statement comes to us it shows exchange rate difference assume is 1000INR so my total loss is 3000 on outgoing payment to vendor so while running FF_5 system should ideally pick up the foreign exchange gain loss account difference 1000 INR but its not hitting to DAT G.L account its making normal BRS entry dats is Outgoing clearing account dr TO main bank a/c 76000.

so let me know your comments we have very short aspen of time advice me i am missing either any configuration setting for this..