ajax file uploader not work

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ASP.NET

i use ajax file uploader:

<asp:ToolkitScriptManager ID="ToolkitScriptManager1" runat="server">
  </asp:ToolkitScriptManager>
  <div>
      <asp:AsyncFileUpload ID="AsyncFileUpload1" runat="server"
          onuploadedcomplete="AsyncFileUpload1_UploadedComplete" />
      <asp:Image ID="Image1" runat="server" />
  </div>
<asp:Label ID="Label1" runat="server" Text="Label"></asp:Label>

At Code Behind:

AsyncFileUpload1_UploadedComplete
{
string path = Server.MapPath("~/Upload/") + e.FileName;
        AsyncFileUpload1.SaveAs(path);

        Image1.ImageUrl= "~/Upload/" + e.FileName;
 Label1.Text="/Upload/"+ e.FileName;

}

But Image is not shown in image1 control,
and label1 also not shown any text:

so what can i do:
i want that, when user upload image, then with out refresing page,
image is show in Image1 control,

I think that when UploadedComplete Event called it not refress full page,so image and label is blank