ModalPopup Issue

I am having trouble with my ModalPopup Not Displaying

1. Toolkit is latest version

2. Used both ToolScript And Script Managers

3. Inside and outside of Update Panel

<ajx:ModalPopupExtender ID="ModalPopupExtender1" runat="server" TargetControlID="Button1" PopupControlID="TestPopup" BackgroundCssClass="bg-modal" CancelControlID="Button2" OkControlID="Button3" /><asp:Panel runat="server" ID="TestPopup" CssClass="message" Style="display: none"><h3>Test</h3><asp:Button ID="Button2" runat="server" Text="Cancel" /><asp:Button ID="Button3" runat="server" Text="OK" /></asp:Panel>

4. Will Not show with button click, or using SHOW()

5. When outside of update  panel I click the button to display the Popup, but only reloads the page