I've put an AJAXUploader inside a MultiView which is inside an UpdatePanel, and the Multiview will not switch.
I've searched the boards and with info provided tried sticking a hidden AJAXUploader  outside the multiview but that doesn't solve the problem.  I've created a simple demo page that replicates the problem, will post code below.
I have checked and the code below works fine when the update panel is removed.
Notes:  Running on Server 2008 / IIS7, ASP.NET 3.5, Visual Studio 2008
    
        Code: HTML/ASPX
        
        <asp:ScriptManager ID="scm1" runat="server"></asp:ScriptManager>
<asp:UpdatePanel ID="updp1"  runat="server">
<ContentTemplate>
<eo:AJAXUploader runat="server" TempFileLocation="\\Salmon.ba.wsu.edu\Web$\TempFiles" ID="auHidden" Visible="false">
	<LayoutTemplate>
		<asp:PlaceHolder id="InputPlaceHolder" runat="server" />
		<asp:Button ID="UploadButton" runat="server" Text="Upload" />
	</LayoutTemplate>
</eo:AJAXUploader>
<asp:MultiView ID="mv1" runat="server" ActiveViewIndex="0">
<asp:View ID="vw1" runat="server">
	<asp:Button ID="btn1" runat="server" OnClick="DoViewSwitch" Text="Switch to uploader" />
</asp:View>
<asp:View ID="vw2" runat="server">
	<eo:AJAXUploader runat="server" ID="fuFiles" TempFileLocation="\\Salmon.ba.wsu.edu\Web$\TempFiles">
		<LayoutTemplate>
			<table border="0" cellpadding="0" cellspacing="0" width="100%">
				<tr>
					<td>
						<asp:PlaceHolder id="InputPlaceHolder" runat="server" />
					</td>
					<td>
						<asp:Button ID="UploadButton" runat="server" Text="Upload" />
					</td>
				</tr>
				<tr>
					<td colspan="2">
						<eo:ProgressBar id="ProgressBar" runat="server" ControlSkinID="None" Height="12px"  BorderColor="black" BorderStyle="Solid" BorderWidth="1px" BackColor="#f4c3a3" IndicatorColor="#ec7e3b" />
						<asp:PlaceHolder id="ProgressTextPlaceHolder" runat="server" />
					</td>
				</tr>
				<tr>
					<td>
						<asp:PlaceHolder id="PostedFilesPlaceHolder" runat="server">Posted Files Place Holder </asp:PlaceHolder>
					</td>
					<td>
						<asp:LinkButton id="DeleteButton" runat="server" Text="delete"></asp:LinkButton>
					</td>
				</tr>
			</table>
		</LayoutTemplate>
	</eo:AJAXUploader>
</asp:View>
</asp:MultiView>
</ContentTemplate>
</asp:UpdatePanel>
 
     
 
    
        Code: C#
        
        protected void DoViewSwitch(object sender, EventArgs e)
	{
		mv1.SetActiveView(vw2);
	} 
     
 
David L. Sargent
Developer
Washington State University