Hi
Please look at the following code:
<%@ Page Language="C#" AutoEventWireup="true" CodeFile="lixo.aspx.cs" Inherits="lixo" %><%@ Register Assembly="AjaxControlToolkit" Namespace="AjaxControlToolkit" TagPrefix="ajaxToolkit" %><!DOCTYPE html><html xmlns="http://www.w3.org/1999/xhtml"><head runat="server"><meta http-equiv="Content-Type" content="text/html; charset=utf-8"/><title></title><link rel="stylesheet" type="text/css" href="http://programamos.pt/cheirabem/css/geral.css"/><link rel="stylesheet" type="text/css" href="css/geral.css"></head><body><form id="form1" runat="server"><div> <asp:ScriptManager ID="ScriptManager1" runat="server"></asp:ScriptManager><ajaxToolkit:TabContainer ID="TabContainer1" Visible="true" runat="server"><ajaxToolkit:TabPanel runat="server" HeaderText="ola"><ContentTemplate>tests</ContentTemplate></ajaxToolkit:TabPanel> </ajaxToolkit:TabContainer></div></form></body></html>
It works fine on localhost

But not on my website as you can test at:
http://programamos.pt/cheirabem/lixo.aspx
And my website runs very slow when I use ajaxtoolkit.
All the files are on Bin folder (inside httpdocs) as image below

Any help?