WHT code

 Hi Guys

( Its urgent )

A entered invoice without WHT code , validated and created invoice. I have also ran transfer to GL as well.But at the time of payment of this particular invoice , I realized that WHT has to be deducted on invoice.That's why I searched the invoice and assigned WHT code on line level. I moved to payment workbench and paid the invoice but system did not deduct the wht and paid inv. with full amount.

I positively sure that wht code is not assigned at validated invoice on line level in data base although wht code displayed and saved in inv. workbench.