Error connection FCM xmpp connection by matrix xmpp

See more:

C#

XMPP

FCM

I am trying to connect FCM xmpp server by matrix client but the connection is not authenticated and opened.

getting the error message as No connection could be made because the target machine actively refused it 74.125.24.188:5235

What I have tried:

xmppClient.XmppDomain = "gcm.googleapis.com";
xmppClient.Hostname = "fcm-xmpp.googleapis.com";
xmppClient.Port = 5235;

xmppClient.ResolveSrvRecords = false;
xmppClient.OldStyleSsl = true;

xmppClient.Username = senderId;     // your sender id
xmppClient.Password = serverKey;    // your server key

xmppClient.AutoRoster = false;
xmppClient.AutoPresence = false;
xmppClient.Open();

var jsonMessgae = new JObject(new
{
	notification = new
	{
		title = "Portugal vs. Denmark",
		body = "5 to 1"
	},
	message_id = Guid.NewGuid().ToString(),
	to = testDeviceId
});

var msg = new Message { Id = Guid.NewGuid().ToString() };
msg.Add(new Gcm { Value = jsonMessgae.ToString() });

xmppClient.Send(msg);