Receiving interface

Is anyone using the receiving interface from Lawson to Par Excellence (or possibly another system)?  When we receive a Par Excellence PO in Lawson (PO30), it writes a receiving file to the Lawson server which in turn gets picked up and moved to Par Excellence to perform automatic receiving in that system.  The problem is that in our test environment, it creates a header record with the file and in production it doesn't.  There must be a flag somewhere that tells it to write the header record but I cannot figure out where it is.  I looked in PO30 but there are no work files defined.  It actually happens when they release the receiver on PO30.