i tried and crash..
i manage to undo.. then try this and its works..
Just remove this :
if (is_array($this->tab_modules_list['slider_list']) && count($this->tab_modules_list['slider_list']))
$this->page_header_toolbar_btn['modules-list'] = array(
'href' => '#',
'desc' => $this->l('Recommended Modules')
);
dont remove the rest..