Bill of Exchange issue

Dear All

I have one issue in Bill of Exchange

Example1

FB70

Customer A/C Dr 100

To Sale 100

F-36 - Payment

Customer A/C Spl GL (BOE receivable )Dr 100

To Customer 100

F-33 - Discounting

Bank Ac Dr 100

To Contingent Liabilities A/c 100

F-20 - Reverse Contingent Liability

Contingent Liabilities A/c 100

To Customer Spl GL (BOE receivable ) 100

FBZG-Edit of Pail Payment

I maintain the document of F-36 and mention TOTAL Amount and done the carry out update

System is reversing the BOE receivable and bank also properly.

But if i discounting the bill with bank in T-code F-33 if Bank charge bank charges of 10 rs.

Then in that case when i do FBZG and enter the amount 100 system does not pick even if i enter 90 and bank charges then also system not bill the bill.

Kindly suggest

Shayam