Menu sub-items show in FireFox but not IE7

[Fooberichu]

I have a site I'm developing (temporary link here: http://dev1.homeip.net/adventdvr) that uses the RadMenu for navigation.  So far I've only put a few items on there (all the parent links, a couple child links) and it works fine in FireFox 3.x but doesn't seem to be working in IE7.  Both "Company" and "Product" should show an item each (although only "Product" has an actively working child link).  My menu is defined statically as below:

	<telerik:RadMenu ID="RadMenu1" runat="server" Skin="Advent"
	EnableEmbeddedSkins="False">
	<Items>
	<telerik:RadMenuItem ImageUrl="Images/Menu/btn_company.gif"
	HoveredImageUrl="Images/Menu/btn_company_h.gif" ToolTip="Company" NavigateUrl="Company.aspx">
	<Items>
	<telerik:RadMenuItem Text="Expertise"></telerik:RadMenuItem>
	</Items>
	</telerik:RadMenuItem>
	<telerik:RadMenuItem ImageUrl="Images/Menu/btn_product.gif"
	HoveredImageUrl="Images/Menu/btn_product_h.gif" ToolTip="Product" NavigateUrl="Product.aspx">
	<Items>
	<telerik:RadMenuItem Text="Technology" NavigateUrl="Technology.aspx"></telerik:RadMenuItem>
	</Items>
	</telerik:RadMenuItem>
	<telerik:RadMenuItem ImageUrl="Images/Menu/btn_support.gif"
	HoveredImageUrl="Images/Menu/btn_support_h.gif" ToolTip="Support" NavigateUrl="Support.aspx" />
	<telerik:RadMenuItem ImageUrl="Images/Menu/btn_contact.gif"
	HoveredImageUrl="Images/Menu/btn_contact_h.gif" ToolTip="Contact" NavigateUrl="Contact.aspx" />
	</Items>
	</telerik:RadMenu>

Any idea why it is working ok in FireFox but not IE?

[Fooberichu]

Ok I feel like a real idiot.  nevermind... it was a z-index problem that somehow wasn't a problem in FF but was in IE.  I fixed it by raising the Z-index of the div containing my menu.