Missing parameters after processing a Facebook signed_request

I'm using the following code to generate a facebook registration form:

<iframe src="http://www.facebook.com/plugins/registration.php?
         client_id=$MyClientID&
         redirect_uri=http://localhost/connect/account/RegisterFacebook&fields=name,birthday,gender,location,email"
         scrolling="auto"
         frameborder="no"
         style="border: none" 
         allowtransparency="true" 
         width="100%" 
         height="330">

According to their documentation (and their test site, where my registration 开发者_运维知识库information appears to post correctly), I should have access to the register's name, birthday, gender, location, and email - to be used in my local registration process. I get all of the other parameters (i.e. oauth_toke, user_id, algorithm, expires, etc), but I don't get the "registration" parameters (appear to be nested). I downloaded the latest API, but those variables do not appear available.

Any help would be appreciated. Thanks!

Currently, we do not support this scenario. We are going to have a fix in sometime in the next few days to allow the registration plugin to work with the Facebook C# SDK. It will be included with version 5.0.2.