I am trying to get the AJAX modal Popup extender to work in a custom module.  Everything works great with the exception that the panel comes up way up in the upper left hand corner of the browser. If I add X and Y to the extender that has the effect of graying out the whole screen and the panel showing up in my container instead of on top.

I'm using the CSS file from the toolkit.        

Real simple just testing.

Heres the .ASPX
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            <asp:UpdatePanel ID="UpdatePanel1" runat="server">
                <ContentTemplate>
                    <asp:Panel ID="Panel1" runat="server" Height="120px" Width="371px" Style="display: none" CssClass="modalPopup" BackColor="#E0E0E0">
                        <asp:Panel ID="Panel2" runat="server" BackColor="Silver" Height="23px" Width="372px">
                        </asp:Panel>
                        <asp:DropDownList ID="DropDownList1" runat="server">
                            <asp:ListItem>asdasf</asp:ListItem>
                            <asp:ListItem>asdf</asp:ListItem>
                        </asp:DropDownList>
                        <asp:Button ID="Button1" runat="server" Text="ok" />
                        <asp:Button ID="Button2" runat="server" Text="cancel" /></asp:Panel>
                </ContentTemplate>
            </asp:UpdatePanel>
        </div>
        <asp:Button ID="Button3" runat="server" Text="Button" />
        <cc1:ModalPopupExtender ID="ModalPopupExtender1" runat="server"
                TargetControlID="Button3"
            PopupControlID="Panel1"
            BackgroundCssClass="modalBackground"
            OkControlID="Button1"
            CancelControlID="Button2"
            DropShadow="true"
            PopupDragHandleControlID="Panel2" />
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Code behind:
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      Protected Sub Page_Load(ByVal sender As Object, ByVal e As System.EventArgs) Handles Me.Load
            Try
                If DotNetNuke.Framework.AJAX.IsInstalled() Then
                    DotNetNuke.Framework.AJAX.RegisterScriptManager()
                End If
             Catch exc As Exception    'Module failed to load
                ProcessModuleLoadException(Me, exc)
            End Try
        End Sub
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I've currently have partial render unchecked but have tried this both ways. Anyone else get this control to work in DNN. I can make a webpage with the exact same code work in less than 2 mins, but trying to get it to work in DNN is a no go.

Hmmmmm....

Ok I tried that, no success. I changed the skin of the page to DNN-Blue. Horizontal Menu - Full Width.  Container is Text Header - White Background. Just to take my skin out of the picture.

Still not working.

I put a file named - Horizontal Menu - Full Width.doctype.xml in the DNN-Blue folder in the Default portal folder and copied the above.

Still no success.

Try hitting your web.config to reset the app