Silverlight 4、Google Chrome和HTTPWebRequest问题

我的silvrlight 4应用程序托管在ASP.NET MVC 2中,通过Internet Explorer 8(开发服务器和远程Web服务器(IIS 6.0))使用时工作正常。但是,当我尝试浏览Google Chrome(5.0.375.70版)时,它抛出了“远程服务器返回未找到”错误。导致问题的代码如下:

public class MyWebClient
{
  private HttpWebRequest _request;
  private Uri _uri;
  private AsyncOperation _asyncOp;

  public MyWebClient(Uri uri)
  { 
    _uri = uri; 
  }

  public void Start(XElement data)
  {
    _asyncOp = AsyncOperationManager.CreateOperation(null);
    _data = data;
    _request = (HttpWebRequest)WebRequest.Create(_uri);
    _request.Method = "POST";
    _request.BeginGetRequestStream(new AsyncCallback(BeginRequest), null);
  }

  private void BeginRequest(IAsyncResult result)
  {
    Stream stream = _request.EndGetRequestStream(result);
    using (StreamWriter writer = new StreamWriter(stream))
    {
      writer.Write(((XElement)_data).ToString());
    }
    stream.Close();
    _request.BeginGetResponse(new AsyncCallback(BeginResponse), null);
  }

  private void BeginResponse(IAsyncResult result)
  {
    HttpWebResponse response = (HttpWebResponse)_request.EndGetResponse(result);
    if (response != null)
    {
       //process returned data
        ...
    }
  }
  ...
 }

简而言之,上面的代码将一些XML数据发送到Web服务器(到ASP.NET MVC控制器)并返回处理过的数据。它在我使用Internet Explorer 8时工作。有人能解释一下谷歌Chrome有什么问题吗?