I am a newbee (even to this wiki

2 weeks ago i bought some IKEA tradfri stuff. I am having the hub and some lights wich are now put into 2 IKEA groups.
I installed the tradfri plugin for domoitcz (even updated the aiocoap today), and it is visible in the hardware tab of domoticz
25 Tradfri Yes IKEA Tradfri 127.0.0.1 Disabled
It is also visible in my log file. one thing is, that it disconnects very quick

my logfile:
2019-08-18 11:16:26.621 (Tradfri) Connected successfully to: 127.0.0.1
2019-08-18 11:16:33.365 (Nest) Thermostat (Bree Downstairs Setpoint)
2019-08-18 11:16:33.368 (Nest) Temp + Humidity (Bree Downstairs TempHum)
2019-08-18 11:16:37.092 (Tradfri) Device has disconnected
The big problem is that i don't know how to proceed..... How can i get my tradfri lights visible in domoticz?
How must i add the lights into domoticz? It is not visible when using "learning light/switchs" in the switches tab...