How to use broadcastMsg to communicate with my AMS application?

Hello,

I'm trying to communicate with my AMS application through the Administration API, using the broadcastMsg() method.
If I understood the documentation correctly, it should be able to call a function I have in my main.asc file. I think I misunderstand, because I try to call the addActorIP function, but nothing happens.

Can you please help me?

Here is my request: http://MY_SERVER_IP:1111/admin/broadcastMsg?auser=MY_USERNAME&apswd=MY_PASSWORD&scope="App:myApp/_definst_"&method="addActorIP"&arg0="1"&arg1="127.0.0.1"

Here is my server side code:

var clients = {};
var games = {};

application.allowDebug = true;

application.onAppStart = function () {
    trace("[System] FMS server started.");
}

application.onConnect = function (client, actorid) {
    trace("[Login] ActorId: " + actorid);
    client.ActorId = actorid;
    clients[actorid] = client;
    application.acceptConnection(client);

    // trace(client.ip);

    var so = SharedObject.get("CONNECT-actorId-" + actorid, true);
    so.setProperty("connectStatus", actorid + ":connected");

    client.addActorIP = function(ActorId, IP) {
        // var user = SharedObject.get("IP-" + ActorId + "-" + IP);

        trace("ActorId: " + ActorId + ", IP: " + IP);
    }

    application.onDisconnect = function (client) {
        // code here
        }
    }

    application.onAppStop = function () {
        trace("[System] Clearing shared objects...");
        application.clearSharedObjects("/");
        application.shutdown();
    }
}

Good evening, and thank you in advance for your answers!

~ Polo