Why foreign currency payment (while manually posting using Manual payment type) is not creating auto

   Hello,

      I wanted to understand in oracle payable 11i-5-10-2, Setup is to create the withholding invoice at the payment level and withholding calculation is setup at the payment level.  We use Manual payment type to post all our foreign currency transactions in the system. but, when we use the MANUAL type as the payemnt type to post the payments, it doesn't create any withholding invoices to the Tax Authorities.

   If I use QUICK payment as the payment type instead of MANUAL, than process works fine and it creates the automatic withholding invoice. Is this correct, that withholding invoice only gets created if we use the payemnt QUICK as the payemnt type.