Magento – Custom checkout_submit_all_after Observer Not Working

I am trying to write observer.for reference i am following below tutorial
http://franklinstrube.com/blog/magento-event-observers/ . but my custom observer i not getting triggered. I am using Magento ver. 1.8.1.0 CE

my app/code/local/sv/ConnectInfusion/etc/config.xml file is as follows

<?xml version="1.0"?>
<config>
    <modules>
        <sv_ConnectInfusion>
            <version>1.0.0</version>
        </sv_ConnectInfusion>
    </modules>
    <global>
        <models>
            <ConnectInfusion>
                <class>sv_ConnectInfusion_Model</class>
            </ConnectInfusion>
        </models>
        <events>
                <checkout_submit_all_after>
                    <observers>
                        <awesome_example>
                            <class>sv_ConnectInfusion_Model_Observer</class>
                            <method>SyncWithInfusion</method>
                        </awesome_example>
                    </observers>
                </checkout_submit_all_after>
            </events>
        </global>
</config>

My Observer file is

app/code/local/sv/ConnectInfusion/Model/Observer.php

class sv_ConnectInfusion_Model_Observer {
    /**
     * This function is triggered by a Magento observer declared
     * in etc/config.xml
     *
     * @param Varien_Event_Observer $observer
     */
    public function SyncWithInfusion($observer)
    {
        // Your magic code goes here...
        $event = $observer->getEvent()->getControllerAction()->getFullActionName();

        Mage::log('Event Fired: ' . $event);
        Mage::log('yeah i am in observer !! it works' , null , 'mylog.log');
        die();
    }
}

and my app/etc/modules/sv_ConnectInfusion.xml file is as follows.

<?xml version="1.0"?>
<config>
    <modules>
        <sv_ConnectInfusion>
            <active>true</active>
            <codePool>local</codePool>
            <depends>
                <Mage_Checkout/>
                <Mage_Sales/>
                <Mage_CatalogInventory/>
            </depends>
        </sv_ConnectInfusion>
    </modules>
</config>

what i am doing wrong? I tried by changing the xml files, adding <depends> , i also tried to move the code in community directory but still no luck.