Rising an event in parent page by a button which is in updatepanel

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C#

ASP.NET

i know that i didn't describe the problem clearly but believe that i have no idea how should i explain it.

The button is rising the following event in parent page, but the javascript alert doesn't fire, do you have any idea?

<asp:UpdatePanel ID="UpdatePanel1" runat="server">
    <ContentTemplate>
        <asp:Button ID="btnContinue2" runat="server" OnClick="btnContinue2_Click"       Text="Button" />
    </ContentTemplate>
</asp:UpdatePanel>

i put a break point in the InsertLocationMap_MyEvent, so everything is fine until there but the alert box doesn't popup, is the reason that there is no postback ?

protected void Page_Load(object sender, EventArgs e)
       {
           InsertLocationMap.MyEvent += InsertLocationMap_MyEvent;

       }

       void InsertLocationMap_MyEvent(object sender, usercontrols.cp_user.MyEventArgs e)
       {

           string javaScript = "<script language=JavaScript> alert('wwwoww'); </script>";
          System.Web.UI.ScriptManager.RegisterStartupScript(this, this.GetType(), "JCall2", javaScript, false);

       }