Manage service confirmation - web service generate blocked status invoice

Dear All

I have problems with calling web service Manage Service Confirmation.

First, I have created service order with associate to service confirmation. After that I called web service to update each line item

of service confirmation one-by-one until the last item with this SOAP message

<ServiceConfirmation>

   <ID>665</ID>

   <Item>

    <ID>10</ID>

    <FinishFulfilmentProcessingItem>true</FinishFulfilmentProcessingItem>

   <!-- <ConfirmExecutionItem>true</ConfirmExecutionItem> -->

   </Item>

</ServiceConfirmation>

But it's generated blocked status invoice request instead of To be invoice status.

How can I do this scenario with the result of To be invoice status of invoice request?

Best Regards,

Krit R.