接收google checkout反馈信息的时候出现401错误，
查看记录，google无法访问我的服务器？
------解决方案--------------------------------------------------------
You need to turn off an anonymous in iis and then use the sample code
to authenticate the response.
You are most likely on a shared server and the shared server is trying
to authenticate Google against the domain.
There are samples showing how to set up the authentication module.
http://code.google.com/p/google-checkout-dotnet-sample-code/downloads...
Once you set up the web.config file, it will use the Merchant Id and
Key in the web.config file to authenticate the callbacks.