Opecart 3.0.3 Event Not Working

I have written a shipping extension which works fine but I need opencart event to update the shipping API using curl but it seems not to be working.
I have the following written at admin/controller/extension/module/post_order.php

<?php
class ControllerExtensionModulePostOrder extends Controller
{
public function install()
{
$this->load->model('setting/event');

$this->model_setting_event->addEvent('post_order', 'catalog/model/checkout/order/addOrderHistory/after', 'extension/module/post_order/addOrderHistory');
}
public function uninstall()
{
$this->load->model('setting/event');

$this->model_extension_event->deleteEvent('post_order');
}
}
and I also have catalog/controller/extension/module/post_order.php
<?php
class ControllerExtensionModulePostOrder extends Controller {

public function postOrderData(&$route, &$args, &$output) {
$this->log->write('test');

}

}
the code seems not to be running as I cant see the event listed in the event section of admin not also logging the test.
Thanks

Well first fix your code.

Your event is calling yet your module method is
You need to call the correct method For testing events IMO, it's easier to just manually insert the events via your DB and once confirmed working then write the module to install them.

Also use code tags when posting in the future.

Thank you for your reply. I finally figured it out. I was calling the wrong method