how to close correctly?

Use application.disconnect(clientObj) in the server-sided code to remove a client the 'hard way' from your FMS

OR

call a function on the client that closes their own connection to your FMS.
Make sure you WAIT for the event that occurs after your issue the netstream.close() function.

e.g.

Flash client-code:

// track the status of your netstream object

my_netstream.onStatus = function(infoObject:Object) {
trace("NetStream.onStatus called: ("+getTimer()+" ms)");
// output all variables
for (var prop in infoObject) {
trace("\t"+prop+":\t"+infoObject[prop]);
}
if (infoObject.code == "NetStream.Unpublish.Success") {
// ok our publishing stream has been stopped
if (bool_stop_now == true) {
// we had to stop ; close our connection to the FMS server
my_netconnection.close();
}
}
};

// client-side function ; call this one from the server
my_netconnection.close_from_server = function () {
bool_stop_now = true;
my_netstream.close();
}


The reason you might want to wait for events to occur is that you might close the connection too fast to your FMS ; the netstream might not be closed correctly in time resulting in an idling stream on your FMS.