Spry menu not working in IE for some reason

Question

Hello, I have an issue at hand that is quite troubling
I am designing a website in Dreamweaver CS3 for the childcare place I work for, and it was coming along great until I realized that I never stopped to see if the spry worked in Internet Explorer (I use FireFox on average). Turns out, it doesn't, and does this sort of weird thing where all the menu items are backwards and the submenus only show on the far right of the page.
It works fine in FireFox, so I am truly curious on what I might've done wrong here.
Check out the page here: http://www.woadove.com/index.html
And if you need to see the Spry, here it is:
@charset "UTF-8";
/* SpryMenuBarHorizontal.css - Revision: Spry Preview Release 1.4 */
/* Copyright (c) 2006. Adobe Systems Incorporated. All rights reserved. */
LAYOUT INFORMATION: describes box model, positioning, z-order
/* The outermost container of the Menu Bar, an auto width box with no margin or padding */
ul.MenuBarHorizontal
    margin: 0;
    padding: 0;
    list-style-type: none;
    font-size: 72%;
    cursor: default;
    border: 2;
    text-align: center;
/* Set the active Menu Bar with this class, currently setting z-index to accomodate IE rendering bug: http://therealcrisp.xs4all.nl/meuk/IE-zindexbug.html */
ul.MenuBarActive
    z-index: auto;
/* Menu item containers, position children relative to this container and are a fixed width */
ul.MenuBarHorizontal li
    margin: 0;
    padding: 0;
    list-style-type: none;
    font-size: 100%;
    position: relative;
    text-align: center;
    cursor: pointer;
    width: 16.66%;
    float: right;
    background-color: #550F0F;
/* Submenus should appear below their parent (top: 0) with a higher z-index, but they are initially off the left side of the screen (-1000em) */
ul.MenuBarHorizontal ul
    margin: 0% 73% 0 27%;
    padding: 0;
    list-style-type: none;
    font-size: 100%;
    z-index: 1020;
    cursor: default;
    width: 8.2em;
    position: absolute;
    left: -1000em;
/* Submenu that is showing with class designation MenuBarSubmenuVisible, we set left to auto so it comes onto the screen below its parent menu item */
ul.MenuBarHorizontal ul.MenuBarSubmenuVisible
    left: auto;
/* Menu item containers are same fixed width as parent */
ul.MenuBarHorizontal ul li
    width: 120%;
/* Submenus should appear slightly overlapping to the right (95%) and up (-5%) */
ul.MenuBarHorizontal ul ul
    position: relative;
    margin: -5% 20% 0 75%;
/* Submenu that is showing with class designation MenuBarSubmenuVisible, we set left to 0 so it comes onto the screen */
ul.MenuBarHorizontal ul.MenuBarSubmenuVisible ul.MenuBarSubmenuVisible
    left: auto;
DESIGN INFORMATION: describes color scheme, borders, fonts
/* Submenu containers have borders on all sides */
ul.MenuBarHorizontal ul
    border: 0;
/* Menu items are a light gray block with padding and no text decoration */
ul.MenuBarHorizontal a
    display: block;
    cursor: pointer;
    background-color: #6F3838;
    padding: 0.5em 0.75em;
    color: #FFFFFF;
    text-decoration: none;
/* Menu items that have mouse over or focus have a blue background and white text */
ul.MenuBarHorizontal a:hover, ul.MenuBarHorizontal a:focus
    background-color: #FFCC00;
    color: #000000;
/* Menu items that are open with submenus are set to MenuBarItemHover with a blue background and white text */
ul.MenuBarHorizontal a.MenuBarItemHover, ul.MenuBarHorizontal a.MenuBarItemSubmenuHover, ul.MenuBarHorizontal a.MenuBarSubmenuVisible
    background-color: #FFCC00;
    color: #000000;
SUBMENU INDICATION: styles if there is a submenu under a given menu item
/* Menu items that have a submenu have the class designation MenuBarItemSubmenu and are set to use a background image positioned on the far left (95%) and centered vertically (50%) */
ul.MenuBarHorizontal a.MenuBarItemSubmenu
    background-image: url(SpryMenuBarDown.gif);
    background-repeat: no-repeat;
    background-position: 95% 50%;
/* Menu items that have a submenu have the class designation MenuBarItemSubmenu and are set to use a background image positioned on the far left (95%) and centered vertically (50%) */
ul.MenuBarHorizontal ul a.MenuBarItemSubmenu
    background-image: url(SpryMenuBarRight.gif);
    background-repeat: no-repeat;
    background-position: 95% 50%;
/* Menu items that are open with submenus have the class designation MenuBarItemSubmenuHover and are set to use a "hover" background image positioned on the far left (95%) and centered vertically (50%) */
ul.MenuBarHorizontal a.MenuBarItemSubmenuHover
    background-image: url(SpryMenuBarDownHover.gif);
    background-repeat: no-repeat;
    background-position: 95% 50%;
/* Menu items that are open with submenus have the class designation MenuBarItemSubmenuHover and are set to use a "hover" background image positioned on the far left (95%) and centered vertically (50%) */
ul.MenuBarHorizontal ul a.MenuBarItemSubmenuHover
    background-image: url(SpryMenuBarRightHover.gif);
    background-repeat: no-repeat;
    background-position: 95% 50%;
BROWSER HACKS: the hacks below should not be changed unless you are an expert
/* HACK FOR IE: to make sure the sub menus show above form controls, we underlay each submenu with an iframe */
ul.MenuBarHorizontal iframe
    position: absolute;
    z-index: 1010;
/* HACK FOR IE: to stabilize appearance of menu items; the slash in float is to keep IE 5.0 from parsing */
@media screen, projection
    ul.MenuBarHorizontal li.MenuBarItemIE
        display: inline;
        f\loat: left;
        background: #FFF;

Answer 1

Change the HTML markup to read
  <div id="header">
    <h1 align="center"><img src="banner-revised.png" width="700" height="272" /></h1>
    <ul id="MenuBar1" class="MenuBarHorizontal">
      <li><a href="index.html" class="MenuBarItemSubmenu">Home</a>
        <ul>
          <li><a href="missionstatementcss.html">Our Mission Statement</a></li>
          <li><a href="philosophycsstext.html">Our Philosophy</a></li>
          <li><a href="#">Overview</a></li>
        </ul>
      </li>
      <li><a href="aboutcss.html" class="MenuBarItemSubmenu">About Us</a>
        <ul>
          <li><a href="#">The School</a></li>
          <li><a href="#">The Faculty</a></li>
          <li><a href="calendar.html">Calendar</a></li>
          <li><a href="#">Photo Gallery</a></li>
        </ul>
      </li>
      <li><a href="#">Academics</a></li>
      <li><a href="#" class="MenuBarItemSubmenu">Child Development</a>
        <ul>
          <li><a href="registration_cd.html">Registration</a></li>
        </ul>
      </li>
      <li><a href="elementarycss.html" class="MenuBarItemSubmenu">Elementary</a>
        <ul>
          <li><a href="#">Registration</a></li>
        </ul>
      </li>
      <li><a href="contactuscss.html">Contact Us</a></li>
    </ul>
  </div><!-- end #header -->
As a last remark, if you want to center text do so using the CSS rule.
For example instead of <div align="center"> use <div style="text-align: center;">. This will make it HTML compliant.
Also use normal tags rather than divs to apply styles.
For example where you had <li><div align='center'><a href='#'>Some Text</a></div></li> use <li style='text-align: center;'><a href='#'>Some Text</a></li>
The above two examples show the use of in-line style rules which are selective style rules. Better still is to define rules that cover every instance at once so that, if you want to change the rule, you only need to do so once rather than multiple times.
I hope this helps.
Ben