Game invite for non-hosted game

Question

I'm working on a game using Facebook, but not hosted by Facebook. One of the things I would like to do is to invite other people via Facebook to play a game. I've found the invite API, that looks something like this:

FB.ui({method: 'apprequests',
    message: 'Some message goes here',
}, 
function(response){
    // Do stuff here
}
);

Ideally I would like clicking on the link from that invitation to go to my web site, but there doesn't seem to be a way to do that. Am I missing something completely, or does this just not seem to do what I think it should at all?