V4.1.x {$title} and {$description} in mail

[zooi +]

Hello,

I like to use title and description of the listing in the receipt mail after a user has placed an ad.
I have enclosed below code in the mail template receipt.tpl and neworder.tpl

   <strong>{$smarty.const.LANG_TITLE}:</strong> {$title}<br />
    <strong>{$smarty.const.LANG_DESCRIPTION}:</strong> {$description}<br />

Unfortunately the text is in the received mail, but the listing content (Title and description) are blank.

I assume some additional php files have to be modified, or is it not even possible to enclose the ad title and description to the mail?

Looking forward to suggestions and help.

Thank you