Button events on Modal Popup don't fire...

I'm really starting to hate AJAX. That aside, I have a Modal Popup. I coded my own Show and Hide events for it in code behind. Unfortunately the Click events for my Ok and Cancel buttons on the Popup don't actually fire when you click then. Anybody have an idea why? Thanks in advance...

<asp:ModalPopupExtender ID="mpeLoan1" runat="server"
                          PopupControlID="pnlLoan1"
                          TargetControlID="btnLoan1"
                          BackgroundCssClass="modalBackground"
                          DropShadow="True"
                          Enabled="True"></asp:ModalPopupExtender><asp:Panel ID="pnlLoan1" CssClass="pnlBackGround" runat="server" Width="450px"><div id="divLoan1" style="height: 250px; overflow: auto;"><asp:CheckBoxList ID="cblLoan1EndorsementsPop" runat="server"></asp:CheckBoxList></div><asp:Button ID="btnLoan1Ok" runat="server" Text="OK" /><asp:Button ID="btnLoan1Cancel" runat="server" Text="Cancel" /></asp:Panel>