Multi OU at Payments in Payables

I have created a DFF at Receipt form in Receivables I am storing

Check Number

Customer Name

Maturity Date

Amount

this DFF is available on Payment form to pick particular Check to make payment in Payables

In this way i am forwarding check to my Suppliers that i have taken from Customers

MO: Default OU is OU1

when i take a Receipt in OU2 which is not my default OU

then in Check Number LOV i dont get any value(any Check) this is in Payables

when i defaulted OU2 as my Default OU in MO: Default OU

than i was able to pick checks