Why don't I get notifications on the client?

gistfile1.txt

//Client
Meteor.autosubscribe(function() {
    console.log("Subbed to request");
    Meteor.subscribe("requests", Session.get('player_id'), function(){
        var call = Requests.findOne();
        console.log("in request (call: " +call+")");
        Meteor.call("answerCall", call._id);
    });
});

//Server
Meteor.publish("requests", function(player_id) {
    console.log("player_id: "+player_id+", log count: "+Calls.find({toUser: player_id, status: "request"}).count());
    var self = this;
    var handle = Calls.find({toUser: player_id, status: "request"}).observe({
        added : function(doc) {
            self.set("requests", doc._id, doc);
            self.flush();
        }
    });
});