Update GrossPrice in Sales Document using XML

Question

Hi, experts:
I want to update SaleOrder via DI Server. The document is based on GrossPrice.  So fileds like Price, UnitPrice, DiscountPercent, LineTotal are not post to DI Server. Here is my Xml:
<?xml version="1.0"?>
<BOM xmlns="http://www.sap.com/SBO/DIS">
  <BO>
    <AdmInfo>
      <Object>oOrders</Object>
    </AdmInfo>
    <QueryParams>
      <DocEntry>3524</DocEntry>
    </QueryParams>
    <Documents>
      <row>
        <DocTotal>1100</DocTotal>
      </row>
    </Documents>
    <Document_Lines>
      <row>
        <LineNum />
        <ItemCode />
        <ItemDescription />
        <Quantity>2</Quantity>
        <ShipDate />
        <Price />
        <PriceAfterVAT>200</PriceAfterVAT>
        <Currency />
      </row>
    </Document_Lines>
    <Document_LinesAdditionalExpenses>...</Document_LinesAdditionalExpenses>
    <WithholdingTaxLines>...</WithholdingTaxLines>
    <SerialNumbers>...</SerialNumbers>
    <BatchNumbers>...</BatchNumbers>
    <DocumentsAdditionalExpenses>...</DocumentsAdditionalExpenses>
    <WithholdingTaxData>...</WithholdingTaxData>
    <Document_SpecialLines>...</Document_SpecialLines>
    <TaxExtension>...</TaxExtension>
  </BO>
</BOM>
Problem happens when I post this Xml to DI server. With the updating of GrossPrice, I got a discount too. The NetPrice failed to Change with the GrossPrice. I am working under 2007B PL10, which is said to have fixed this bug. Something wrong with my Xml? or how can I prepare my Xml?

Answer 1

Verner, thank you. I modified my Xml and only PriceAfVat in document_line was posted to DI server. But the discount in document_line still comes out.  As you can see in the Xml, all other fields not shown here are left blank in the xml :
<BOM xmlns="http://www.sap.com/SBO/DIS">
<BO>
  <AdmInfo>
  <Object>oOrders</Object>
  </AdmInfo>
  <QueryParams>
  <DocEntry>3516</DocEntry>
  </QueryParams>
  <Document_Lines>
  <row>
  <PriceAfterVAT>650</PriceAfterVAT>
Still waiting for the answer...