<%@ Page Title="" Language="VB" MasterPageFile="~/MasterPage.master" AutoEventWireup="false" CodeFile="Default2.aspx.vb" Inherits="User_Default2" %>

<%@ Register assembly="AjaxControlToolkit" namespace="AjaxControlToolkit" tagprefix="cc1" %>


<asp:Content ID="Content1" ContentPlaceHolderID="ContentPlaceHolder1" Runat="Server">
    <script type="text/javascript" src="js/swfobject.js">
      var stageW = 560;
      var stageH = 300; 
      var cacheBuster = Date.parse(new Date());
      var flashvars = {};
      var params = {};
      
      params.bgcolor = "#ffffff";
      params.allowfullscreen = "true";
      params.wmode = "transparent";
      
      flashvars.componentWidth = 470;
      flashvars.componentHeight = 105;
      
      flashvars.pathToFiles = "timer/";
      flashvars.settingsPath = "xml/settings.xml";
      
      flashvars.timeLeft = 10000;
      
      
      flashvars.redirect = "http://fln.somee.com/default.aspx";

        var so = new SWFObject("preview.swf?t="+cacheBuster, "FlabellComponent", stageW, stageH, "9.0.124", "js/expressInstall.swf", flashvars, params);
        so.write("flashcontent"); // qui inseriamo l'id del contenitore
  </script>
    <p>
        <asp:ScriptManager ID="ScriptManager1" runat="server">
        </asp:ScriptManager>
        <asp:Label ID="Label1" runat="server" Text="Label"></asp:Label>
    </p>
<div id="flashcontent">Testo o immagine sostitutiva del filmato</div>
  <div id="FlabellComponent">
    <p>
      <a target="_blank" href="http://www.adobe.com/go/getflashplayer" rel="nofollow">
      <img src="http://www.adobe.com/images/shared/download_buttons/get_flash_player.gif" alt="Get Adobe Flash player"/>
      </a>
    </p>  
  </div>
</asp:Content>/code] 

Mentre questo lato codice vb:

 Protected Sub Page_Load(ByVal sender As Object, ByVal e As System.EventArgs) Handles Me.Load
        Label1.Text = Now
    
        Dim gv_deadline As String, gv_now As Date, gv_then As Date
        Dim gv_endDate As Array, gv_endDay As Array, gv_endHrs As Array
        Dim gv_timerMiliseconds As Long

        gv_deadline = "11/12/2009 17:00" ' edit doomsday

        gv_endDate = Split(gv_deadline, " ")

        gv_endDay = Split(gv_endDate(0), "/")
        gv_endHrs = Split(gv_endDate(1), ":")

        gv_now = DateTime.Now
        gv_then = FormatDateTime(gv_endDay(0) & "/" & gv_endDay(1) & "/" & gv_endDay(2) & " " & gv_endHrs(0) & ":" & gv_endHrs(1))
        gv_timerMiliseconds = DateDiff(DateInterval.Second, gv_now, gv_then) * 1000
        Label1.Text = gv_timerMiliseconds

    End Sub
 

La variabile funziona ma il countdown non si visualizza.
Grazie a tutti