PHP case error

KODS:

$tpl->assign("IMG_TOP","<img src=gfx/logo_niz.jpg>");
if ($ln=='ru') {
switch($id)
{
//ru
case "2":
    $tpl->assign("IMG_TOP","<img src=gfx/logo_nizRU.jpg>");
break;
case "3":
    $tpl->assign("IMG_TOP","<img src=gfx/logo_nizRU.jpg>");
break;
case "4":
    $tpl->assign("IMG_TOP","<img src=gfx/logo_nizRU.jpg>");
break;
}
}
if ($ln=='en') {
switch($id){
//en
case "2": ... uutt



Vai peec shii koda juus vareetu pateikt , kaapeec pirmajaa kodaa rindinjaa noraada shaadu error : Fatal error: Call to a member function on a non-object in /www/demo.........../index.php on line 57