Mysidia Adoptables Support Forum - Give promocode when buy item?

i've seeing the files and i made this:

PHP Code:


		
			
function items_milagros($item, $adopt){

$codigopromo = $adopts->select("items_functions", array(), "code")->fetchObject();

$mtitle = "Has ganado un logro!";

        $mtext = "Felicitaciones!  Has recibido una recompenza. El código es el siguiente:{$codigopromo} . Puedes usarlo en la página de promos. Para saber como usarlo hay una guía correspondiente.";



        $date = date('Y-m-d');

        $GLOBALS['adopts']->insert("messages", array("id" => NULL, "fromuser" => "SYSTEM", "touser" => $owner, "status" => "unread", "datesent" => $date, "messagetitle" => $mtitle, "messagetext" => $mtext));

        

        $row = $GLOBALS['adopts']->select("users", array(), "username='{$owner}'")->fetchObject();    



        $newmessagenotify=$row->newmessagenotify;

        $email=$row->email;

        

        if($newmessagenotify == 1) {

            // We are sending this user an email about the new message...

            $systememail = grabanysetting("systememail"); // QUERYPROBLEM - we should get the settings at the beginning so we never need to call for them after that.            

            $headers = "From: {$systememail}";

            $site_name = grabanysetting("sitename"); // QUERYPROBLEM - see, two queries for this message alone.

            $message = "Hello {$owner};\n\nYou have received a new Private Message from SYSTEM at {$site_name} with the title {$mtitle}.\n

            You can read this message at: http://www.".constant("DOMAIN").constant("SCRIPTPATH")."/messages.php\n

            Thank You.  The {$site_name} team.";



            mail($email, $site_name." - You Have Received a Reward", $message, $headers);

        }

        

$note = "Has conseguido un código promo!";

return $note;

}

Its a new function. I want that when i use a item with this function, the system send me a pm, giving me a promocode.

But doesn't work. Any idea? when i use the item, the screen goes blank.
Thank you