asp:menu populated from asp:dropdown using ajax.net problem

I have a dropdown that when selected, chooses which sitemap to bind my menu to. This is because each sitemap has a different set of permissions using the security model.  I'm trying to use ajax.net so that when the dropdown selected index is changed, the menu populates without reloading the page. Its simple not doing it and the page refreshes every time. Anyone have experience with this?? Thanks so much


<asp:DropDownList ID="ddNavigation" AutoPostBack="true" runat="server" BackColor="White" Font-Names="verdana" Font-Size="X-Small" ForeColor="RoyalBlue" OnSelectedIndexChanged="ddNavigation_SelectedIndexChanged"
							Width="170px">
							<asp:ListItem Value="0">Home</asp:ListItem>
							<asp:ListItem>Administration</asp:ListItem>
							<asp:ListItem>Employees</asp:ListItem>
							<asp:ListItem>Requirements/Attendance</asp:ListItem>
							<asp:ListItem>Reports</asp:ListItem>
						</asp:DropDownList>
						<asp:UpdatePanel ID="UpdatePanel1" runat="server">
							<ContentTemplate>
								<asp:Menu ID="Menu1" runat="server" BackColor="RoyalBlue" Width="170px" DynamicHorizontalOffset="2" Font-Names="Verdana" Font-Size="X-Small" ForeColor="White" StaticSubMenuIndent="5px" StaticDisplayLevels="2"
									Font-Underline="False" CssClass="menu">
									<DynamicHoverStyle BackColor="MidnightBlue" ForeColor="White" />
									<DynamicMenuStyle BackColor="RoyalBlue" CssClass="sublevel1" />
									<DynamicMenuItemStyle HorizontalPadding="5px" VerticalPadding="2px" />
									<StaticHoverStyle BackColor="MidnightBlue" />
								</asp:Menu>
							</ContentTemplate>
							<Triggers>
								<asp:AsyncPostBackTrigger ControlID="ddNavigation" EventName="SelectedIndexChanged" />
							</Triggers>
						</asp:UpdatePanel>

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G2internAsked:
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DavidTMooreConnect With a Mentor Commented:
As far as I can tell that code looks fine, my next guess would be that it has something to do with your web.config file.  Did you take make all the updates to your web.config when you began using ajax?

this information can be found here:
http://asp.net/ajax/documentation/live/ConfiguringASPNETAJAX.aspx

hope this helps

cheers
~David
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DavidTMooreCommented:
do you have a scriptManager control on your page?
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G2internAuthor Commented:
I do have a script manager above this code, I just did not throw it in the code snippet. Sorry for that.
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G2internAuthor Commented:
Thanks so much, I watched their introduction video on the ajax.net website, and it didn't mention the web.config added sections. Thanks so much!!
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