SubMenu Problem

Hey,

There are 2 menu set in the wordpress site.
1. Top Menu
2. Middle Menu

Both of these menus are displaying properly.
Issue:
In the Middle menu there are some child pages of some pages. The child pages are not displaying on mouse hover of the parent pages. I have used CSS based dropdown menu.

Here I have posted the codes of the 2 sections.
1. Code for Top Menu (No issue)

<div class="top_menu_div">
                	<ul>
			<?php wp_list_pages('orderby=name&link_before=<span>&link_after=</span>&title_li=&depth=1&include=3,5,7,9,11'); ?>
                    </ul>
                 </div>

2. Code for Middle Menu (Problem)

<div class="middle_menu_div">
        	<ul id="TJK_dropDownMenu">
                 <?php wp_list_pages('orderby=name&title_li=&sort_column=menu_order&include=13,15,17,19,21,23,25,26,28'); ?>
          </ul>
		</div>

Please take a look on section 2 codes and please help me with the code how to display the sub pages on this section. In this section I include those pages with the id which have sub pages.

Thanks in advance.