As per another fourm discussion I used this model to open the webdialog from an asp button.
But I can not get the Loadded control to show. Also I get an exception the second time I hit the button
Any help would be great.
Thank you,

<asp:Button ID="Button1" runat="server" Text="Show WebDialogBox" OnClick="Button1_Click" />
        <ISWebDesktop:WebDialogBox ID="dlgBox" runat="server" Width="600px" Height="400px"
            DialogBoxImage="None" Text="WebDialogBox test">
            <ContentTemplate>
                <asp:UpdatePanel ID="UpdatePanel1" runat="server" UpdateMode="Always">
				<ContentTemplate>
                <asp:Panel ID="Panel1" runat="server">
				</asp:Panel></ContentTemplate>
				</asp:UpdatePanel>
				
            </ContentTemplate>
			
            <WindowSettings>
                <CommandButtonStyle>
                    <Active BackColor="#8A887B" BaseStyle="Normal" ForeColor="White">
                    </Active>
                    <Over BackColor="#C5C2AF" BaseStyle="Normal">
                    </Over>
                    <Normal BackColor="Control" BorderColor="ControlDarkDark" BorderStyle="Solid" BorderWidth="1px"
                        Font-Bold="False" Font-Italic="False" Font-Names="Tahoma" Font-Size="8pt" Font-Underline="False">
                    </Normal>
                </CommandButtonStyle>
                <ContainerStyle BackColor="White" Font-Names="Tahoma" Font-Size="8pt" Width="100%">
                </ContainerStyle>
                <WindowStyle>
                    <Active BaseStyle="Normal" BorderColor="Silver">
                        <BorderSettings>
                            <Top Style="none" />
                        </BorderSettings>
                    </Active>
                    <Normal BackColor="White" BorderColor="#B0CFF7" BorderStyle="Solid" BorderWidth="1px"
                        Font-Names="Tahoma" Font-Size="8pt">
                    </Normal>
                </WindowStyle>
                <CaptionStyle>
                    <Active BackgroundImage="/CommonLibrary/Images/WebDesktop/Mac/center_active.gif"
                        BaseStyle="Normal" ForeColor="Black">
                        <Padding Top="1px" Left="10px" Bottom="3px" Right="3px" />
                    </Active>
                    <Normal BackColor="Gray" Cursor="Default" Font-Bold="False" Font-Names="segoe ui, tahoma"
                        Font-Size="10pt" ForeColor="Black">
                    </Normal>
                </CaptionStyle>
                <CaptionButtonStyle>
                    <Active BaseStyle="Normal">
                        <BorderSettings>
                            <Top Color="Gray" />
                            <Left Color="Gray" />
                        </BorderSettings>
                    </Active>
                    <Over BaseStyle="Normal">
                        <BorderSettings>
                            <Bottom Color="Gray" />
                            <Right Color="Gray" />
                        </BorderSettings>
                    </Over>
                    <Normal BorderColor="#B0CFF7" Height="17px" Overflow="Hidden" OverflowX="Hidden"
                        OverflowY="Hidden">
                        <Margin Bottom="-2px" Right="4px" Top="4px" />
                    </Normal>
                </CaptionButtonStyle>
                <CommandButtonDisabledStyle BackColor="Control" BackgroundImage="" BorderColor="ControlDarkDark"
                    BorderStyle="Solid" BorderWidth="1px" CustomRules="" Font-Bold="False" Font-Italic="False"
                    Font-Names="Tahoma" Font-Size="8pt" Font-Underline="False" ForeColor="Gray">
                </CommandButtonDisabledStyle>
            </WindowSettings>
        </ISWebDesktop:WebDialogBox>

<script type="text/javascript">
    function ShowDialogBox() {
    	var dlgBox = ISGetObject("dlgBox");
    	dlgBox.ShowDialog();
    }
</script>

protected void Button1_Click(object sender, EventArgs e)
	{
		Control EditContractControl = LoadControl("controls/EditContacts.ascx");
		Panel test = (Panel)dlgBox.FindControl("Panel1");
		test.Controls.Clear();
		test.Controls.Add(EditContractControl);
		fpb.ClientAction.InvokeScript("ShowDialogBox();");
	}