While running F110 mail trigger should happen at the time of payment Run

Hi Experts,

I have configured FBZP and automatic mail trigger for Payment Advice also. Now while running F110 then at the time of Proposal Run the mail is getting triggered. But since its proposal it can be edited also. So I need the mail should trigger at the time of Payment Run. Plz suggest how to achieve this.

Thanks in Advance,

Arabinda