How to create new section in admin order view information tab?

Question

I am trying to create a new block in my admin panel "Sales->Order->View" Information tab.

In my extension's block folder i have a folder named Adminhtml in this i have file named : Company.php

class Namespace_Modulename_Block_Adminhtml_Company extends Mage_Adminhtml_Block_Sales_Order_Abstract
{
 }

In my extension module i have placed this code in config.xml under etc folder

 <adminhtml>
    <layout>
        <updates>
            <modulename>
                <file>module.xml</file>
            </modulename>
        </updates>
    </layout>
</adminhtml>

then i have my adminhtml layout file as :

<?xml version="1.0"?>
  <layout version="0.1.0">
   <modulename_adminhtml_company_index>
    <reference name="order_info">
        <block type="modulename/adminhtml_company" name="modulename" template="company.phtml" />
    </reference>
   </modulename_adminhtml_company_index>
  </layout>

But nothing happened yet,

Answer 1

If this is what you are trying to accomplish

Take a look @ Magento custom "order" attribute / admin input and display

If you are trying to create a new tab take a look @ http://fishpig.co.uk/magento/tutorials/custom-tabs-magento-product-admin/