Magento: Observer + Router + Controller not working

I'm working on a MassAction plugin for Sales/Order using Observer. I cant get the controller route to work.

Here is my etc/config.xml

<?xml version="1.0" encoding="UTF-8"?>

<config>
    <modules>
        <Clubcard_Compressfiles>
            <version>1.0.0</version>
        </Clubcard_Compressfiles>
    </modules>

    <adminhtml>
        <events>
            <adminhtml_block_html_before>
                <observers>
                    <Clubcard_Compressfiles_Model_Observer>
                        <type>singleton</type>
                        <class>Clubcard_Compressfiles_Model_Observer</class>
                            <method>compressfiles</method>
                    </Clubcard_Compressfiles_Model_Observer>
                </observers>
            </adminhtml_block_html_before>
        </events>             
    </adminhtml>
    <admin>
        <routers>
            <compress>
                <use>admin</use>
                <args>
                    <module>Clubcard_Compressfiles</module>
                    <frontName>compress</frontName>
                </args>
            </compress>
        </routers>
    </admin>

</config>

my folder structure:

- Compressfiles
-- Model / Observer.php
-- Controller / IndexController.php
-- etc / config.xml

Here is my controller - this is where I dont understand how to get the controller URL:

<?php

require_once 'Mage/Adminhtml/controllers/Sales/OrderController.php';

class Clubcard_CompressFiles_Sales_IndexController extends Mage_Adminhtml_Sales_OrderController {


protected function _construct()
{
    Mage::log("COMPRESS");
    die('it works');

}

public function indexAction() {

    Mage::log("COMPRESS");

    echo "test2";

}

public function compressAction() {

    Mage::log("COMPRESS");

    echo "test2";

}

}

?>