help with sglobals

[3XTR3M3]

i get this error when i try accessing staff menu .

Fatal error: Call to undefined method headers::smenuarea() in /home/liamm09/public_html/sglobals.php on line 93

so then i try removing the () in sglobals staff menu comes on but there nothing click so is there summit missing

check_level();
$h = new headers;
$h->startheaders();
$fm=money_formatter($ir['money']);
$cm=money_formatter($ir['crystals'],'');
$lv=date('F j, Y, g:i a',$ir['laston']);
global $atkpage;
$staffpage=1;
if($atkpage)
{
$h->userdata($ir,$lv,$fm,$cm,0);
}
else
{
$h->userdata($ir,$lv,$fm,$cm);
}
$h->smenuarea();

?>