Spry Dropdown creating white space as long as hidden submenus

Can anyone help me fix this? I have the ul.MenuBarHorizontal ul position set to relative because if I choose any other option on iE it causes the sub menus to list horizontally instead of dropping down correctly. Right now on firefox and ie there is a big white space underneath my menu ( I am using a CMS system called "Liferay" but I dont think that is affecting it. )


Code:
ul.MenuBarHorizontal
{
	margin: 0;
	padding: 0;
	list-style-type: none;
	font-size: 100%;
	cursor: default;
	width: auto;
	font-family: "Trebuchet MS", Arial, Helvetica, sans-serif;
	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: 1000;
}
/* 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;
	cursor: pointer;
	width: 183.4px;
	float: left;
}
/* 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;
	padding: 0;
	list-style-type: none;
	font-size: 100%;
	z-index: 1020;
	cursor: default;
	position:relative;
	left: -1000em;
	width: auto;
	text-align: left;
}
/* 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: 0;
}
/* Menu item containers are same fixed width as parent */
ul.MenuBarHorizontal ul li
{
	width: 183.4px;
}
/* Submenus should appear slightly overlapping to the right (95%) and up (-5%) */
ul.MenuBarHorizontal ul ul
{
	position:relative;
	margin: -5% 0 0 95%;
}
/* 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: 0;
	top: 0;
}

/*******************************************************************************

 DESIGN INFORMATION: describes color scheme, borders, fonts

 *******************************************************************************/

/* Submenu containers have borders on all sides */
ul.MenuBarHorizontal ul
{
border: 1px solid !important;
	border-color: #D6D6D6 !important;
}
/* Menu items are a light gray block with padding and no text decoration */
ul.MenuBarHorizontal a
{
	display: block;
	cursor: pointer;
	background-color: #F0F0F0;
	color: #333;
	text-decoration: none;
	background-attachment: fixed;
	padding: .25em .75em;
	border: 1px solid;
	border-color: #D6D6D6;
	border: 1px solid !important;
	border-color: #D6D6D6 !important;
}
/* 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: #CCC;
	color: #FFF;
	background-image: none;
	text-align: center;
}
/* 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: #CCC;
	color: #09F;
}

/*******************************************************************************

 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%;
	text-align: center;
}
/* 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;
	filter:alpha(opacity:0.1);
}
/* 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: inherit;
	f\loat: left;
	background: #FFF;
	}
}