classic pagination by button

Hi

I am using classic pagination plugin and in my view i am using link
to list items by updated at

<td><%= link_to "list by id", {:action => "list_by_update"}%></td>

controll goes

def list_by_update
    @item_pages, @items = paginate :item, :per_page => 10, :order_by =>
'updated_at'
    render_action 'index'
end

So if i use this kind of system it gives a error:

Couldn't find Item with ID=list_by_update

so i changed action to method call but it won't paginate the list.