Bu affiliate to come for Gain loss acounting line for payment worksheet

Hi,

We are trying to pass BI & AR transactions with BU Affiliate, corresponding accounting entries also contains BU Affiliate.

It is going fine in Billing where both rev & control acc are picking up the as well as in Billing accounting entries.

this is also getting populated in pending item as well as in Item created in AR.

But when i do payment for the same the Gain/Loss accounting line is not getting populated BU Affiliate.

Please let us know what we can do in this same.

& we can not specify the same in Distribution code for the same in real gain & loss set up as the BUA is more than one.