Questions about Freight Update

Hi,

I am running the Freight update program to update the billable and payable charges. The Payable charges side is working correctly--like creating a freight payable document FT in Supplier ledger.

But on the Billable side, the sales order was not added a line for the billable charges, .After running the freight update, this is what i have observed:

1) Billable charge amount was not added as a separate line to the sales order.

2) Sales order status did not advance

3) Shipment status did not advance

although the shipment charges screen shows the billable amounts. Can you please let me know what might be the reason for this behavior of the R4981 program, i already looked at the Freight update program document from Oracle but could not find what might be the possible cause/s for this.