error for ajax loaded nodes

when i get node with

$anode = node_load(45);
$node_html = drupal_render(node_view($anode));

and return it to page with ajax, the flag link doesnt have handler to this new DOM element, so ajax flagging don't work. how i can bind flag handler to this new dom element? i tried to call updateLink() from flag.js but it don't work.