oDeliveryNotes serial nbr error when using sales BoM with DI server

Hi all,

we're trying to create a delivery note with DI server for items managed by serial number and sales bom.

This is a sample xml:

<?xml version="1.0" encoding="utf-16"?>

http://schemas.xmlsoap.org/soap/envelope/">

<env:Header>

<SessionID>F6166595-C4E0-4B5E-B44C-85CB04FAA0C9</SessionID>

</env:Header>

<env:Body>

http://www.sap.com/SBO/DIS" CommandID="ConsegnaOpen">

<BOM>

<BO>

<AdmInfo>

<Object>oDeliveryNotes</Object>

</AdmInfo>

<Documents>

<row>

<CardCode>C9999</CardCode>

</row>

</Documents>

<Document_Lines>

<row>

<ItemCode>S610STW-220</ItemCode>

<Quantity>220</Quantity>

</row>

</Document_Lines>

<SerialNumbers>

<row>

<InternalSerialNumber>AD00003</InternalSerialNumber>

<SystemSerialNumber>3</SystemSerialNumber>

<BaseLineNumber>1</BaseLineNumber>

</row>

</SerialNumbers>

</BO>

</BOM>

</dis:AddObject>

</env:Body>

</env:Envelope>

And this is the returned error: "You should use existing serial/batch numbers for this document type [(----) 29-51]"

Any idea why?

Thanks

Fabio