Save the form. Important: The Purchase Order Client filter executes on Submit.
In the Purchase Order Client form, open the request you created in step 11. If the GetPurchaseOrder web service was successful, the request is submitted and contains the same values as the record in the Purchase Order form where you set PO ID to 111. The values corresponding to the request you created for the Line Items form (steps 5 through 8) also appear in the Line Items Client form.