remoting出错，大家看看是什么有关问题

remoting出错，大家看看是什么问题？
远程对象：
public class SimpleMath : MarshalByRefObject ,ISimpleMath.ISimpleMath
  {
  public int Add(int n1, int n2)
  {
  Console.WriteLine("SimpleMath.Add() executing on thread {0}",Thread.CurrentThread.GetHashCode());
  Thread.Sleep(5000);
  return n1 + n2;
  }

  private delegate int BinaryOperatorDelegate(int n1, int n2);

  public void AsyncAdd(int n1, int n2, IClientCallback.IClientCallback callback)
  {
  Console.WriteLine("SimpleMath.AsyncAdd() executing on thread {0}",Thread.CurrentThread.GetHashCode());
  BinaryOperatorDelegate binOp = new BinaryOperatorDelegate(Add);
  binOp.BeginInvoke(n1, n2, new AsyncCallback(DoClientCallback), callback);
  }

  private void DoClientCallback(IAsyncResult ar)
  {
  Console.WriteLine("DoClientCallback executing on thread {0}",Thread.CurrentThread.GetHashCode());

  AsyncResult asyncResult = (AsyncResult)ar;
  BinaryOperatorDelegate binOp = (BinaryOperatorDelegate)asyncResult.AsyncDelegate; //取得异步委托
  int result = binOp.EndInvoke(ar); //取得运算结果

  IClientCallback.IClientCallback callback = (IClientCallback.IClientCallback)ar.AsyncState; //取得回调对象
  callback.ResultCallback(result); //调用接口方法
  }
  }


客户端：
public class ClientCallbackSink : MarshalByRefObject,IClientCallback.IClientCallback
  {
  public void ResultCallback(int result)
  {
  Thread.Sleep(1000);
  Console.WriteLine("ResultCallback executing on thread {0}",Thread.CurrentThread.GetHashCode());
  Console.WriteLine("Add result is {0}",result);

  Thread.Sleep(1000);
  }
  }
 class Program
  {
  static void Main(string[] args)
  {
  Console.WriteLine("Main executing on thread {0}",Thread.CurrentThread.GetHashCode());

  HttpChannel channel = new HttpChannel(0);
  ChannelServices.RegisterChannel(channel, false);

  ISimpleMath.ISimpleMath simpleMath = (ISimpleMath.ISimpleMath)Activator.GetObject(typeof(ISimpleMath.ISimpleMath), "http://localhost:8001/SimpleMath.soap");
  ClientCallbackSink callback = new ClientCallbackSink();
  simpleMath.AsyncAdd(5, 2, callback);

  Console.WriteLine("Press enter to end...");
  Console.ReadLine();
  }
  }

服务端：
class Program
  {
  static void Main(string[] args)
  {
  Console.WriteLine("Main executing on thread {0}", Thread.CurrentThread.GetHashCode());

  HttpServerChannel channel = new HttpServerChannel(8001);
  ChannelServices.RegisterChannel(channel, false);

  RemotingConfiguration.RegisterWellKnownServiceType(typeof(SimpleMath.SimpleMath), "SimpleMath.soap", WellKnownObjectMode.SingleCall);

  Console.WriteLine("Press enter to exit...");
  Console.ReadLine();
  }
  }


还有些接口代码没贴，主要是个异步操作的小例子，运行出错，大家帮忙看看是可能是啥问题？

[解决办法]
错误提示信息？
------解决方案--------------------

把服务端注册信道的代码改为：

C# code

BinaryServerFormatterSinkProvider serverProvider = new BinaryServerFormatterSinkProvider();            BinaryClientFormatterSinkProvider clientProvider = new BinaryClientFormatterSinkProvider();            serverProvider.TypeFilterLevel = System.Runtime.Serialization.Formatters.TypeFilterLevel.Full;            IDictionary props = new Hashtable();            props["port"] = 8001;            HttpChannel channel = new HttpChannel(props, clientProvider, serverProvider);            ChannelServices.RegisterChannel(channel, false);
[解决办法]
呵呵，我知道，你这个例子，是服务器和客户端互相调用，和那个广播的例子(remoting和delgate综合)类似
你的问题是由于安全过高所致的，.NET Framework1.0,和1.1为了安全提高了远程运用delgate的安全。 可以在代码和配置文件中修改，但是当初我怎么修改的我忘记了。你可以查找一下。