Крайний срок в задачах

if (CModule::IncludeModule("tasks"))
{
$id_task = 44;
    $rsTask = CTasks::GetList(array(), array("ID"=>$id_task));
    if ($arTask = $rsTask->GetNext())
    {
        echo $arTask["DEADLINE"];
    }
}

$date_shop=date('d.m.Y H:i:s', strtotime('+7 days'));$obTask1 = new CTasks;
$succs=$obTask1->Update($ID,Array("DEADLINE"=>$date_shop));