Block on Adminhtml dissappear after upgrade to Magento 1.9

Question

This is my code:

on app/design/adminhtml/default/default/layout/infocurci/fidelity.xml

<adminhtml_sales_order_view>
    <reference name="order_info">
        <block type="infocurci_fidelity/adminhtml_riepilogocliente" name="infocurci_fidelity_riepilogocliente" template="infocurci/fidelity/riepilogocliente.phtml" />
    </reference>
</adminhtml_sales_order_view>

on Magento 1.5, it works fine. After upgrade to Magento 1.9, my block is not show yet. If I try:

<adminhtml_sales_order_view>
    <reference name="content">
        <block type="infocurci_fidelity/adminhtml_riepilogocliente" name="infocurci_fidelity_riepilogocliente" template="infocurci/fidelity/riepilogocliente.phtml" />
    </reference>
</adminhtml_sales_order_view>

it works fine, it appears on the end of page. But I want this code at the end of "order_info" block..

Answer 1

Not sure how this layout was in 1.5, but... have you tried that with after="-" parameter?

<adminhtml_sales_order_view>
    <reference name="order_info">
        <block type="infocurci_fidelity/adminhtml_riepilogocliente" name="infocurci_fidelity_riepilogocliente" template="infocurci/fidelity/riepilogocliente.phtml" after="-"/>
    </reference>
</adminhtml_sales_order_view>