jquery ajax调用适用于localhost，但不适用于实时服务器

我整天都在研究这个问题，这似乎是一个常见的问题，但我找不到解决方案。

I've researched this issue all day and it seems to be a somewhat common problem, but I have not been able to find a solution.

我正在使用jquery的 $。ajax（）用于进行更新数据库中某些值的服务调用的函数。它在localhost上运行正常，但在实际服务器上，我在控制台窗口中收到500内部服务器错误。

I am using jquery's $.ajax() function to make a service call that updates some values in the database. It runs fine on localhost, but on the actual server I get a 500 Internal Server Error in the console window.

我的客户端代码如下：

var param = FunctionToMakeKeyValueString();
$.ajax({
    type: "POST",
    url: "../Helpers/Autocomplete.asmx/OrderStatements",
    data: { param: param },
    clientType: "application/json; charset=utf-8",
    datatype: "json",
    async: true,
    success: function () { ShowSuccess();},
    error: function () { ShowError(); }
});

服务器端代码是：

[WebService(Namespace = "http://tempuri.org/")]
[WebServiceBinding(ConformsTo = WsiProfiles.BasicProfile1_1)]

// To allow this Web Service to be called from script, using ASP.NET AJAX, uncomment the following line. 
[System.Web.Script.Services.ScriptService]
public class AutoComplete : System.Web.Services.WebService {

    public AutoComplete () {

        //Uncomment the following line if using designed components 
        //InitializeComponent(); 
    }

    [WebMethod]
    public void OrderStatements(string param)
    {
        IncomeStatementService service = new IncomeStatementService();

        string[] comps = param.Split(';');
        foreach (string s in comps)
        {
            int id;
            short order;
            string[] pieces = s.Split(':');
            if (int.TryParse(pieces[0], out id) && short.TryParse(pieces[1], out order))
            {
                IncomeStatement statement = service.FindBy(id);
                statement.Order = order;
                service.UpdateOrder(statement);
            }
        }
    }
}

实际的asmx文件只是

the actual asmx file is just

 <%@ WebService Language="C#" CodeBehind="~/App_Code/AutoComplete.cs" Class="AutoComplete" %>

我确定网址是正确的（.js文件位于帮助程序的兄弟文件夹中，其中包含asmx），但我还需要在IIS或web.config文件中设置其他内容吗？谢谢！

I'm sure the url is correct (the .js file is in a sibling folder to Helpers, which contains the asmx), but is there something else that I need to set in IIS or the web.config file? Thanks!