Editing order_notification.tpl

Hi,

I’ve a problem with order emails too.

In the email notification sent to the customer there is just firstname like Dear Mike,

But i wanna add the lastname too, i chanced the order_notifications.tpl like this:



before:



{* $Id: order_notification.tpl 7703 2009-07-13 10:36:45Z angel $ }



{include file=“letter_header.tpl”}



{$lang.dear} {$order_info.firstname},





{$order_status.email_header|unescape}





{$lang.invoice}:




{include file=“orders/invoice.tpl”}



{include file=“letter_footer.tpl”}



after:



{
$Id: order_notification.tpl 7703 2009-07-13 10:36:45Z angel $ *}



{include file=“letter_header.tpl”}



{$lang.dear} {$order_info.firstname} {$order_info.lastname},





{$order_status.email_header|unescape}





{$lang.invoice}:




{include file=“orders/invoice.tpl”}



{include file=“letter_footer.tpl”}



and still nothing can anyone help pls?