Hi

I have just installed the CSS FLyout header, and it has stopped the remained of the page from showing

Code:
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml" dir="ltr" lang="en">
<head>
<title>The Flower Stall, Flowers for all Occasions</title>
<meta http-equiv="Content-Type" content="text/html; charset=iso-8859-1" />
<meta name="keywords" content="Weddings Sympathy Anniversaries Just to say.... Mothers Day Nappy Cakes Corporate Gift Vouchers Weddings, Anniversaries, valentine, anniversary, sorry, birthday, gift, flowers, present " />
<meta name="description" content="The Flower Stall :  - Weddings Sympathy Anniversaries Just to say.... Mothers Day Nappy Cakes Corporate Gift Vouchers Weddings, Anniversaries, valentine, anniversary, sorry, birthday, gift, flowers, present" />
<meta http-equiv="imagetoolbar" content="no" />
<meta name="author" content="The Zen Cart&trade; Team and others" />
<meta name="generator" content="shopping cart program by Zen Cart&trade;, http://www.zen-cart.com eCommerce" />
 
<base href="http://www.the-flower-stall.co.uk/" />
<link rel="canonical" href="http://www.the-flower-stall.co.uk/" />
 
<link rel="stylesheet" type="text/css" href="includes/templates/the-flower-stall/css/stylesheet.css" />
<link rel="stylesheet" type="text/css" href="includes/templates/the-flower-stall/css/stylesheet_css_buttons.css" />
<link rel="stylesheet" type="text/css" href="includes/templates/the-flower-stall/css/stylesheet_header_menu.css" />
<link rel="stylesheet" type="text/css" media="print" href="includes/templates/the-flower-stall/css/print_stylesheet.css" />
</head>
 
<body id="indexHomeBody">
 
<div id="mainWrapper">
<!--bof-header logo and navigation display-->
<div id="headerWrapper">
  <!--bof-navigation display-->
  <div id="navMainWrapper">
    <div id="navMain">
      <div id="navMainLinks">
        <ul class="back">
          <li><a href="http://www.the-flower-stall.co.uk/">Home</a></li>
                    <li><a href="http://www.the-flower-stall.co.uk/index.php?main_page=login&amp;zenid=n49ig91352h7svbn03jfb8ell5">Log In</a></li>
                            </ul>
      </div>
      <div id="navMainSearch">
              </div>
    </div>
  </div>
  <div class="clearBoth"></div>
  <!--eof-navigation display-->
  <!--bof-branding display-->
  <div id="logoWrapperOuter">
    <div id="logoWrapper">
      <div id="logo"><a href="http://www.the-flower-stall.co.uk/"><img src="includes/templates/template_default/images/logo.jpg" alt="The Flower Stall" title=" The Flower Stall " width="700px" height="111px" /></a></div>
          </div>
  </div>
</div>
<div class="clearBoth"></div>
<!--eof-branding display-->
<!--eof-header logo and navigation display-->
<!--bof-header ezpage links-->
<!--eof-header ezpage links-->
<!--bof-optional categories tabs navigation display-->
<div id="navCatTabsWrapper">
<div id="navCatTabs">
<ul>
  <li><a class="category-top" href="http://www.the-flower-stall.co.uk/index.php?main_page=index&amp;cPath=4&amp;zenid=n49ig91352h7svbn03jfb8ell5">Anniversaries</a> </li>
  <li><a class="category-top" href="http://www.the-flower-stall.co.uk/index.php?main_page=index&amp;cPath=9&amp;zenid=n49ig91352h7svbn03jfb8ell5">Corporate</a> </li>
  <li><a class="category-top" href="http://www.the-flower-stall.co.uk/index.php?main_page=index&amp;cPath=6&amp;zenid=n49ig91352h7svbn03jfb8ell5">Just to say....</a> </li>
  <li><a class="category-top" href="http://www.the-flower-stall.co.uk/index.php?main_page=index&amp;cPath=7&amp;zenid=n49ig91352h7svbn03jfb8ell5">Mothers Day</a> </li>
  <li><a class="category-top" href="http://www.the-flower-stall.co.uk/index.php?main_page=index&amp;cPath=8&amp;zenid=n49ig91352h7svbn03jfb8ell5">Nappy Cakes</a> </li>
  <li><a class="category-top" href="http://www.the-flower-stall.co.uk/index.php?main_page=index&amp;cPath=3&amp;zenid=n49ig91352h7svbn03jfb8ell5">Sympathy</a> </li>
  <li><a class="category-top" href="http://www.the-flower-stall.co.uk/index.php?main_page=index&amp;cPath=1&amp;zenid=n49ig91352h7svbn03jfb8ell5">Weddings</a> </li>
  <li><a class="category-top" href="http://www.the-flower-stall.co.uk/index.php?main_page=index&amp;cPath=10&amp;zenid=n49ig91352h7svbn03jfb8ell5">Gift Vouchers</a> </li>
</ul>
</div>
</div>
<!--eof-optional categories tabs navigation display-->
<!--bof-drop down menu display-->
<!-- menu area -->
<div id="dropMenuWrapper">
  <div id="dropMenuWrapperb">
    <div id="dropMenuWrapperc">
      <div id="dropMenuWrapperd">
        <div id="dropMenu">
          <ul class="level1">
            <li class="submenu"><a href="http://www.the-flower-stall.co.uk/index.php?main_page=index&amp;zenid=n49ig91352h7svbn03jfb8ell5">Home</a>
              <ul class="level2">
                <li><a href="http://www.the-flower-stall.co.uk/index.php?main_page=products_new&amp;zenid=n49ig91352h7svbn03jfb8ell5">New Products</a></li>
                <li><a href="http://www.the-flower-stall.co.uk/index.php?main_page=products_all&amp;zenid=n49ig91352h7svbn03jfb8ell5">All Products</a></li>
                <li><a href="http://www.the-flower-stall.co.uk/index.php?main_page=specials&amp;zenid=n49ig91352h7svbn03jfb8ell5">Specials</a></li>
                <li><a href="http://www.the-flower-stall.co.uk/index.php?main_page=advanced_search&amp;zenid=n49ig91352h7svbn03jfb8ell5">Search</a></li>
              </ul>
            </li>
            <li class="submenu"><a href="http://www.the-flower-stall.co.uk/index.php?main_page=site_map&amp;zenid=n49ig91352h7svbn03jfb8ell5">Categories</a>
              <ul class="level2"><li>
<a href="http://www.the-flower-stall.co.uk/index.php?main_page=index&amp;cPath=4&amp;zenid=n49ig91352h7svbn03jfb8ell5">Anniversaries</a></li><li>
<a href="http://www.the-flower-stall.co.uk/index.php?main_page=index&amp;cPath=9&amp;zenid=n49ig91352h7svbn03jfb8ell5">Corporate</a></li><li>
<a href="http://www.the-flower-stall.co.uk/index.php?main_page=index&amp;cPath=6&amp;zenid=n49ig91352h7svbn03jfb8ell5">Just to say....</a></li><li>
<a href="http://www.the-flower-stall.co.uk/index.php?main_page=index&amp;cPath=7&amp;zenid=n49ig91352h7svbn03jfb8ell5">Mothers Day</a></li><li>
<a href="http://www.the-flower-stall.co.uk/index.php?main_page=index&amp;cPath=8&amp;zenid=n49ig91352h7svbn03jfb8ell5">Nappy Cakes</a></li><li>
<a href="http://www.the-flower-stall.co.uk/index.php?main_page=index&amp;cPath=3&amp;zenid=n49ig91352h7svbn03jfb8ell5">Sympathy</a></li><li>
<a href="http://www.the-flower-stall.co.uk/index.php?main_page=index&amp;cPath=1&amp;zenid=n49ig91352h7svbn03jfb8ell5">Weddings</a></li><li>
<a href="http://www.the-flower-stall.co.uk/index.php?main_page=index&amp;cPath=10&amp;zenid=n49ig91352h7svbn03jfb8ell5">Gift Vouchers</a></li></ul>            </li>
            <li class="submenu"><a href="http://www.the-flower-stall.co.uk/index.php?main_page=index&amp;zenid=n49ig91352h7svbn03jfb8ell5">Information</a>
              <ul class="level2">
			                    <li><a href="http://www.the-flower-stall.co.uk/index.php?main_page=shippinginfo&amp;zenid=n49ig91352h7svbn03jfb8ell5">Shipping Info</a></li>
								                <li><a href="http://www.the-flower-stall.co.uk/index.php?main_page=privacy&amp;zenid=n49ig91352h7svbn03jfb8ell5">Privacy Policy</a></li>
								                <li><a href="http://www.the-flower-stall.co.uk/index.php?main_page=conditions&amp;zenid=n49ig91352h7svbn03jfb8ell5">Conditions of Use</a></li>
				                <!--<li><a href="http://www.the-flower-stall.co.uk/index.php?main_page=FILENAME_ABOUT_US&amp;zenid=n49ig91352h7svbn03jfb8ell5">About Us</a></li>-->
                                <li><a href="http://www.the-flower-stall.co.uk/index.php?main_page=site_map&amp;zenid=n49ig91352h7svbn03jfb8ell5">Site Map</a></li>
                                                <li><a href="http://www.the-flower-stall.co.uk/index.php?main_page=gv_faq&amp;zenid=n49ig91352h7svbn03jfb8ell5">Gift Certificate FAQ</a></li>
                                                <li><a href="http://www.the-flower-stall.co.uk/index.php?main_page=discount_coupon&amp;zenid=n49ig91352h7svbn03jfb8ell5">Discount Coupons</a></li>
                                                <li><a href="http://www.the-flower-stall.co.uk/index.php?main_page=unsubscribe&amp;zenid=n49ig91352h7svbn03jfb8ell5">Newsletter Unsubscribe</a></li>
It doesn't appear to have completed the <ul> tag but I am not sure why

It also has started using a logo image from the template_default folder instead of the template I have put together.