Ajax control toolkit: Trouble displaying an image

<asp:Panel ID="Panel1" runat="server" Width="300px">
     <asp:Seadragon ID="Seadragon"
	runat="server"
	SourceUrl="dzc_output.xml">
	
</asp:Seadragon>

<asp:Seadragon ID="Seadragon2" CssClass="seadragon" runat="server" SourceUrl="dzc_output.xml">  
    <ControlsCollection>  
        <asp:SeadragonControl runat="server" Anchor="TOP_RIGHT">  
            <asp:Menu runat="server" BackColor="#FFFBD6" DynamicHorizontalOffset="2" Font-Names="Verdana"  
                Font-Size="10px" ForeColor="#990000" Orientation="Horizontal" StaticSubMenuIndent="10px"  
                Font-Bold="True">  
                <StaticSelectedStyle BackColor="#FFCC66" />  
                <StaticMenuItemStyle HorizontalPadding="5px" VerticalPadding="2px" />  
                <DynamicHoverStyle BackColor="#990000" ForeColor="White" />  
                <DynamicMenuStyle BackColor="#FFFBD6" />  
                <DynamicSelectedStyle BackColor="#FFCC66" />  
                <DynamicMenuItemStyle HorizontalPadding="5px" VerticalPadding="2px" />  
                <StaticHoverStyle BackColor="#990000" ForeColor="White" />  
                <Items>  
                    <asp:MenuItem Text="Menu" Value="Menu" />  
                    <asp:MenuItem Text="Control" Value="Control" />  
                    <asp:MenuItem Text="Over" Value="Over" />  
                    <asp:MenuItem Text="Seadragon" Value="Seadragon" />  
                </Items>  
            </asp:Menu>  
        </asp:SeadragonControl>  
    </ControlsCollection>  
    <OverlaysCollection>  
        <asp:SeadragonScalableOverlay runat="server" Rect-Height="0.24"  
            Rect-Width="0.26" CssClass="overlay"   
            Rect-Point-X="0.14" Rect-Point-Y="0.06">  
        </asp:SeadragonScalableOverlay>  
    </OverlaysCollection>  
</asp:Seadragon>