MQTT.fx Application

I installed MQRR.fx application on my laptop and connected to IP address of my RPi Gateway…
Here is what I get when I follow the steps outlined in Gateway Quick Deployment Guide:

Very strange…what do I do wrong?

On the other side I can see via Shell and les command that data is coming from my Tag…But MQTT seems not getting it…I did configured /etc/dwm1001/dwm1001.config with PAN ID and saved the file - do I need to reboot the Listener?
I rebooted both RPi and the Listener and now the PAN ID is correct 0x47BE and not as indicated on the screenshot…

Adding MQTT log:
1557973027: mosquitto version 1.5.1 starting
1557973027: Config loaded from /etc/mosquitto/mosquitto.conf.
1557973027: Opening ipv4 listen socket on port 1884.
1557973027: Opening ipv6 listen socket on port 1884.
1557973027: Opening websockets listen socket on port 15675.
1557973027: Opening ipv4 listen socket on port 1883.
1557973027: Opening ipv6 listen socket on port 1883.
1557973027: New connection from ::1 on port 1883.
1557973027: New client connected from ::1 as 0000b827ebe61adb (c0, k10, u’dwmuser’).
1557973032: New connection from 127.0.0.1 on port 1883.
1557973032: New client connected from 127.0.0.1 as 0 (c0, k60, u’dwmuser’).
1557973032: Socket error on client 0, disconnecting.
1557973032: New connection from 127.0.0.1 on port 1883.
1557973032: Socket error on client 0, disconnecting.
1557973032: New client connected from 127.0.0.1 as 0 (c0, k60, u’dwmuser’).
1557973977: New connection from 192.168.1.106 on port 1883.
1557973977: New client connected from 192.168.1.106 as d2645dd94c194b6fbb40d109f54430b9 (c1, k60).
1557973991: New connection from 192.168.1.106 on port 1883.
1557973991: New client connected from 192.168.1.106 as 8f48ba97462e4af0a5f77c0f9d661a31 (c1, k60).
1557974500: Client d2645dd94c194b6fbb40d109f54430b9 disconnected.
1557974501: New connection from 192.168.1.106 on port 1883.
1557974501: Client 8f48ba97462e4af0a5f77c0f9d661a31 already connected, closing old connection.
1557974501: Socket error on client 8f48ba97462e4af0a5f77c0f9d661a31, disconnecting.
1557974501: New client connected from 192.168.1.106 as 8f48ba97462e4af0a5f77c0f9d661a31 (c1, k60).
1557974504: Client 8f48ba97462e4af0a5f77c0f9d661a31 disconnected.

EDIT:
I see from the log that MQTT.fx is trying to connect on port 1883
but at the same time the file on RPi: /etc/dwm1001/dwm1001.config
says that: proxy_server_port = 1885
Is this something I need to change on MQTT.fx? Or should I change to 1883 on the config file?