我刚遇到类似的问题，原因是因为facebook似乎将所有请求都作为POST而我的页面是一个静态的html文件，（默认情况下？）IIS7只会由一个获取请求

I just ran into a similar problem which turned out to be because facebook seem to make all requests as a POST and my page was a static html file, which (by default?) IIS7 will only serve by a GET request