PDF Invoice plugin - send invoice right after orde

-- url of the page -- : xx
-- HikaShop version -- : Business: 2.2.0
-- Joomla version -- : 2.5.14
-- PHP version -- : 5.3.27


Hello!

I've bought and successfully installed/configured Hikashop Business, as well as PDF Invoice plugin.

Everything is great, except that I would like that PDF invoices (bills, actually) are sent to clients e-mails automatically - right after they have placed order. How to configure that, which files/templates to modify? I have medium/good level PHP knowledge, so just please point out direction to dig.

Best regards,
looking forward to answer.

UPDATE:

I've found answer in one of previous threads - www.hikashop.com/forum/2-general-talk-ab...-invoices.html#62180

In the file plugins/hikashop/attachinvoice/attachinvoice.php replace the line:

if(empty($data->mail_name) || empty($data->data->order_status) || $data->mail_name != 'order_status_notification' || $data->data->order_status != 'confirmed') return;

by the line:

if(empty($data->mail_name) || empty($data->data->order_status) || !in_array($data->mail_name,array('order_status_notification','order_creation_notification'))) return;

UPDATE 2 :

It seemed almost great after I implemented modification mentioned above, but unfortunately it turns out that there is additional problem - new registred customers now report that upon registration they receive empty Invoice PDF attached to greetings email. What's wrong?

That would mean that there is an error in the modification that was done.
Could you zip a copy of the file you modified so that we can see that ?

Thank You very much for Your response.
Here you go - file in attachment.

UPDATE: sorry, it seems that it was my mistake - I accidentaly commented one line more than neccessary. I corrected and now going to test again.