Hi Nawaz,
Please do following:
1.In T.Code FBZP - setup all company codes for payment transactions , select separate payment per business area check box
2.In T.Code FBZP - setup paying company codes for payment transactions , select separate payment for each reference check box.
3.In the Vendor Master go to payment transactions tab (Under Company Code Data) and below the payment method , there will be individual payment check-box. select that check box.
Thanks and regards,
Mohit Gohil