WCF服务异常

我目前正在开发一个Silverlight 3项目，我正在使用2台机器来测试它。WCF服务异常

“harbinger”是运行Win7 + IIS的Web服务器。我已经将该网页和WCF webservice部署到该机器。

我已经进入以下网址在我的浏览器：

http://harbinger:43011/UserService.svc 
http://harbinger:43011/UserService.svc?wsdl

，并获得网页加载内容的预期两个

接下来我决定进去看看，我可以从我的机器调用web服务，我已经添加了ServiceReference，执行了调用其中一种方法和.... BOOM：

System.ServiceModel.CommunicationException was unhandled by user code 
    Message="An error occurred while trying to make a request to URI 'http://harbinger:43011/UserService.svc'. This could be due to attempting to access a service in a cross-domain way without a proper cross-domain policy in place, or a policy that is unsuitable for SOAP services. You may need to contact the owner of the service to publish a cross-domain policy file and to ensure it allows SOAP-related HTTP headers to be sent. This error may also be caused by using internal types in the web service proxy without using the InternalsVisibleToAttribute attribute. Please see the inner exception for more details." 
    StackTrace: 
     at System.ServiceModel.AsyncResult.End[TAsyncResult](IAsyncResult result) 
     at System.ServiceModel.Channels.ServiceChannel.SendAsyncResult.End(SendAsyncResult result) 
     at System.ServiceModel.Channels.ServiceChannel.EndCall(String action, Object[] outs, IAsyncResult result) 
     at System.ServiceModel.ClientBase`1.ChannelBase`1.EndInvoke(String methodName, Object[] args, IAsyncResult result) 
     at Energy.USR.UserServiceClient.UserServiceClientChannel.EndGetAllUsers(IAsyncResult result) 
     at Energy.USR.UserServiceClient.Energy.USR.UserService.EndGetAllUsers(IAsyncResult result) 
     at Energy.USR.UserServiceClient.OnEndGetAllUsers(IAsyncResult result) 
     at System.ServiceModel.ClientBase`1.OnAsyncCallCompleted(IAsyncResult result) 
    InnerException: System.Security.SecurityException 
     Message="" 
     StackTrace: 
      at System.Net.Browser.AsyncHelper.BeginOnUI(SendOrPostCallback beginMethod, Object state) 
      at System.Net.Browser.BrowserHttpWebRequest.EndGetResponse(IAsyncResult asyncResult) 
      at System.ServiceModel.Channels.HttpChannelFactory.HttpRequestChannel.HttpChannelAsyncRequest.CompleteGetResponse(IAsyncResult result) 
     InnerException: System.Security.SecurityException 
      Message="Security error." 
      StackTrace: 
       at System.Net.Browser.BrowserHttpWebRequest.InternalEndGetResponse(IAsyncResult asyncResult) 
       at System.Net.Browser.BrowserHttpWebRequest.<>c__DisplayClass5.<EndGetResponse>b__4(Object sendState) 
       at System.Net.Browser.AsyncHelper.<>c__DisplayClass2.<BeginOnUI>b__0(Object sendState) 
      InnerException:

有人可以解释发生了什么吗？我需要做什么来避免这种情况？

来源

2010-03-28 Maciek