Observer Noob help?

[absurdparadox]

Hey guys, trying to get my first Observer working.

I have placed the following in includes/auto_loaders/config.test_ordernum.php:

$autoLoadConfig[0][] = array('autoType'=>'class',
                              'loadFile'=>'observers/class.test_observer.php');
$autoLoadConfig[0][] = array('autoType'=>'classInstantiate',
                              'className'=>'test_ordernum',
                              'objectName'=>'test_ordernum'); 

And I have placed the following in include/classes/observers/class.test_observer.php:

class test_ordernum extends base {

    function test_ordernum() {
        $this->attach($this, array('NOTIFY_CHECKOUT_PROCESS_AFTER_ORDER_CREATE'));
    }
        
    function update(&$class, $notifier, $paramsArray) {
        global $db;
        $sql = "INSERT INTO test_ordernum ( orders_id, ordernum) VALUES ('55','test')";
        $result = $db->Execute($sql);
    }
} 

Now, I know for sure that the file is loading, because if I put some jacked up syntax in it, it errors out.

However, my problem is that that query is never running. I'm under the assumption that that is literally all I need in my class -- update should automatically be called when the notificaton is triggered.

Maybe it has something to do with the autoload "breakpoint"? I tried various levels, but no luck. Maybe theres some obvious syntax or reference issue (php is not forte, but I am in experienced in other languages)

Long story short, what I'm trying to do is create an alphanumeric order numer thats based on order date, and due to interfacing with a third party system, it is just easier to store it, instead of doing the display-hack that I've seen a lot of order number modifications do.

Any help is appreciated!