I wonder if I am just nesting too many AJAX containers. Can anybody see why the following wouldn't work. It tells me the PopupExtender is in a different UpdatePanel than the Panel it extends. They are clearly in the same one though. Any thoughts appreciated.
<asp:UpdatePanel ID="udpScheduleModal" runat="server"><ContentTemplate><asp:UpdateProgress ID="UpdateProgress2" AssociatedUpdatePanelID="udpScheduleModal" runat="server"><ProgressTemplate><div style="text-align: center; color: Red; font-size: 12px; font-weight: bold; position: relative;"><img src="images/ewestcor_loader.gif" alt="Loading" /></div></ProgressTemplate></asp:UpdateProgress><asp:ModalPopupExtender ID="mpeSchedule" runat="server"
PopupControlID="pnlModalPopup"
TargetControlID="btnHack"
BackgroundCssClass="modalBackground"
DropShadow="True"
OkControlID="btnHackOK"
CancelControlID="btnCancel" DynamicServicePath="" Enabled="true"></asp:ModalPopupExtender><asp:Panel ID="pnlModalPopup" CssClass="pnlBackGround" runat="server" Width="450px"><table width="100%"><tr><td colspan="2"><asp:Label ID="Label3" runat="server" Text="Quick Schedule Audit" Font-Bold="True" Font-Size="Large"></asp:Label></td></tr><tr><td colspan="2"><asp:Label ID="Label6" runat="server" Text="Auditor:" Width="125px" Font-Size="Medium"></asp:Label><asp:TextBox ID="txtAuditor" CssClass="txtbox" runat="server"></asp:TextBox></td></tr><tr><td colspan="2"><asp:Label ID="Label8" runat="server" Text="Auditor 2:" Width="125px" Font-Size="Medium"></asp:Label><asp:DropDownList ID="ddAuditors" runat="server"></asp:DropDownList></td></tr><tr><td colspan="2"><asp:Label ID="Label7" runat="server" Text="Scope:" Width="125px" Font-Size="Medium"></asp:Label><asp:TextBox ID="txtScope" CssClass="txtbox" runat="server"></asp:TextBox></td></tr><tr><td colspan="2"><asp:Label ID="Label4" runat="server" Text="Schedule Date:" Width="125px" Font-Size="Medium"></asp:Label><asp:TextBox ID="txtCalendar" CssClass="txtbox" runat="server"></asp:TextBox><asp:CalendarExtender ID="cext" TargetControlID="txtCalendar" runat="server" Enabled="True" /></td></tr><tr><td colspan="2"><asp:Label ID="Label5" runat="server" Text="Schedule Time:" Width="125px" Font-Size="Medium"></asp:Label><span id="time" style="font-size: medium">12:00 PM</span> </td></tr><tr><td colspan="2" width="100%" align="center"><asp:HiddenField ID="hfTime" runat="server" /><asp:TextBox ID="txtTimeSlider" runat="server"></asp:TextBox><asp:SliderExtender ID="SliderExtender1" runat="server"
TargetControlID="txtTimeSlider"
BehaviorID="slider"
Minimum="0"
Maximum="95"
Steps="95" Enabled="True" /></td></tr><tr><td colspan="2"> </td></tr><tr><td colspan="2"><asp:CheckBox ID="ckbReminder" runat="server" Font-Size="Medium" Text="Send Audit E-Mail Reminder?" /></td></tr><tr><td colspan="2"> </td></tr><tr><td colspan="2" align="left"><asp:Button ID="btnOK" runat="server" Text="OK" UseSubmitBehavior="False" /><asp:Button ID="btnHackOK" runat="server" Text="OK" Style="display: none" /><asp:Button ID="btnCancel" runat="server" Text="Cancel" UseSubmitBehavior="False" /></td></tr></table></asp:Panel></ContentTemplate><Triggers><asp:AsyncPostBackTrigger ControlID="btnSchedule" EventName="Click" /></Triggers></asp:UpdatePanel>