Corelate 997 with the actual EDI file.

Hi all,
   I have the 997 getting generated ,now since this is generated at the 
HIPAA send , the ISA found in the 997 is a new one. its basically the 
'icout' column value of the 'audout' table. i need a way to corelate this 
997 or get to the ISA in the incoming file.
In the audin table we find a column called 'icr' which gives the actual
ISA, 
but how to relate a record in the audout table with the audin table to get

the ISA13 of the edi file.

Any help is highly appreciated.
Thanks