Dropship Purchase Order has Receive Button instead of Mark Shipped Button

I have a requirement to create purchase order from sales order in net suite through c# code.

code i have used to create purchase order:

var createPurchaseOrder = new PurchaseOrder();

createPurchaseOrder.entity = new RecordRef()

{

internalId = “653”,

name = “Auto”

//type = RecordType.purchaseOrder,

//typeSpecified = true

};

RecordRef soRecordRef = new RecordRef();

soRecordRef.internalId = soInternalId;

soRecordRef.type = RecordType.salesOrder;

soRecordRef.typeSpecified = true;

createPurchaseOrder.createdFrom = soRecordRef;

RecordRef cFormRecordRef = new RecordRef();

cFormRecordRef.internalId = “106”;

createPurchaseOrder.customForm = cFormRecordRef;

RecordRef depRecordRef = new RecordRef();

depRecordRef.internalId = “15”;

depRecordRef.name = “01-Cash”;

depRecordRef.type = RecordType.department;

depRecordRef.typeSpecified = true;

createPurchaseOrder.department = depRecordRef;

RecordRef locRecordRef = new RecordRef();

locRecordRef.internalId = “1”;

locRecordRef.name = “2439”;

locRecordRef.type = RecordType.location;

locRecordRef.typeSpecified = true;