Thats just the page without the query string so you could see if there was something else wrong. When I run it on a page with the query string it still does not work. Here is the actual page I work on with the query string, you can see there is a value for MemberID.
Also I tried to use the feature and just manually entered the email address in universal email wizard to see if it worked and I still got no message. I have tried it with various email address too.