[Serusers] Accounting Bye Problem

[Shirley Toh]

Hi all, 

Please help. My version is ser_rel_0.8.12. I am tracking the PSTN calls into
the acc database. I am encountering one problem. If the calle first hang-up
I am unable to have the BYE message in my database, but if the caller
hang-up first is okie. Please advice what can be the problem is it the acc
module problem

Regards, 
shirley