有谁知道SOAP扩展方面的知识？Wrox书里的例子总是报错！(150刀)

[abedon]

在Wrox的Professional ASP.NET Web Services的第六章《自定义SOAP》里，有一个自定义SOAP扩展的例子，它的任务是将服务器端发出或接收到的SOAP消息记录到事件日志中！
但我运行所带的例子的客户端程序SoapLogClient.exe，总是提示：

An unhandled exception of type 'System.InvalidOperationException' occurred in system.web.services.dll

Additional information: Client found response content type of '', but expected 'text/xml'.

真不知道怎么回事，请多多指教！
谢谢了！

[saucer]

is that book based on .NET beta2? you might need to install Microsoft SOAP Toolkit 2.0 on your machine