modifyOrder() not working

Hello Hikashop Team.

I'm making a payment plugin integration. The only problem I have is that the function $this->modifyOrder($order_id, $this->payment_params->verified_status, true, true); is not working and therefore the order status is not update. I know the onPaymentNotification is working fine and I'm receiving the POST variables because I'm using $this->writeToLog("testx\n"); function and I can see that. So to check where was the problem I put the writeToLog fuction after each line in the onPaymentNotification function, and I verified that the writeToLog after the first modifyOrder function is not printing and also the other writeToLogs after this modifyOrder function. It is like the modifyOrder acts like a loop.
I would like your help with this.

Thank you.

As a future info for me and others

To be able to use the function modifyOrder(), you need to extend hikashopPaymentPlugin.
So when you create your plugin, don't use

class PlgHikashopMyplugin extends JPlugin

class PlgHikashopMyplugin extends hikashopPaymentPlugin