Sap Script Problem

Hi All,

I have a Sapscript program, in it, when i displaying its output, it shows 1 problem.

I insert MRP amount in main window..it coming right but when there is not MRP amount in between line items, it also show same as previous line item MRP amount..

For example:---

Sl. Mat........MRP Amount.....Unit

1....ABC....not MRP amount.....6

2....ASD.......500.00.................8

3....XYZ......not MRP amount....9 (But showing MRP value 500.00 for this line item also)..

4....AAA.......800.00.................3

I want that here must not show MRP value...

Plz explain....