AjaxPro.Method调用为什么总是返回null

我刚学asp.net,看个程序用到了AjaxPro,可是我一调试,所有AjaxPro.Method的调用全都返回null,也不报错...我都晕了,请各位帮帮我啊.

web里我也设置里:
<httpHandlers>
<add verb="*" path="*.ashx" type="AjaxPro.AjaxHandlerFactory,AjaxPro.2"/>
</httpHandlers>

Default.aspx.cs里我也设置了
AjaxPro.AjaxNamespace("xkziBook")]
public partial class _Default : System.Web.UI.Page
{
    protected void Page_Load(object sender, EventArgs e)
    {
        AjaxPro.Utility.RegisterTypeForAjax(typeof(_Default));

    }
[AjaxPro.AjaxMethod]
    public bool userLogin(string pass)
    {
        return false;
    }
..........

Default.aspx的js里我为了查看值如下写的:
alert(xkziBook.userLogin().value);
可是怎么搞它都返回null ,为什么啊? --------------------编程问答-------------------- AjaxPro.AjaxMethod]
    public  static bool userLogin(string pass)
    {
        return false;
    }
--------------------编程问答-------------------- [AjaxPro.AjaxMethod]
    public  static bool userLogin(string pass)
    {
        return false;
    }
--------------------编程问答--------------------



using System;

using System.Data;

using System.Configuration;

using System.Web;

using System.Web.Security;

using System.Web.UI;

using System.Web.UI.WebControls;

using System.Web.UI.WebControls.WebParts;

using System.Web.UI.HtmlControls;



public partial class _Default : System.Web.UI.Page 

{

    [AjaxPro.AjaxNamespace("xkziBook")]

    protected void Page_Load(object sender, EventArgs e)

    {

        AjaxPro.Utility.RegisterTypeForAjax(typeof(_Default));

    }

  

    [AjaxPro.AjaxMethod()]

    public string test(string clid)

    {

        return clid;

    }

}





<%@ Page Language="C#" AutoEventWireup="true" CodeFile="Default.aspx.cs" Inherits="_Default" %>



<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">

<html xmlns="http://www.w3.org/1999/xhtml">

<head runat="server">

    <title>Untitled Page</title>

    <script type="text/javascript">

    function Button1_onclick() 

    {

       alert(_Default.test("123").value);

    }



    </script>



    <link href="StyleSheet.css" rel="stylesheet" type="text/css" />

</head>

<body>

    <form id="form1" runat="server">

        <div>

            <input id="Button1" type="button" value="button" language="javascript" onclick="return Button1_onclick()" /></div>

    </form>

</body>

</html>

--------------------编程问答-------------------- 什么解决啊？

补充：.NET技术 ,  ASP.NET