I have a ModalPopupExtender that I have tied to an asp:button on my page.  Upon 1st press of the button, the code in the button click event executes properly and the popup extender displays with the correct message.  Upon second press of the button, the button click event code does not executed.  Removal of the popup extender to the button allows the code to work correctly.  How do I get the button to execute the Click event the second time on the same page after a display of the popup extender?  I can post code if required.