ok ...
I have added the log level
Then I restarted the agent
Then I restarted the pool on the server
Jumped into the log a here it is:
2020.05.08 14:34:30.615 *D* [ ] Event sender thread started
2020.05.08 14:34:31.616 *I* [ ] NetXMS Agent started
2020.05.08 14:35:23.876 *D* [ ] Incoming connection from 10.6.6.17
2020.05.08 14:35:23.876 *D* [ ] Connection from 10.6.6.17 rejected
2020.05.08 14:35:30.615 *D* [dc ] DataCollector: sleeping for 60 seconds
10.6.6.17 is the NetXMS server self
so I again opened the nxagentd.conf and I have put there:
MasterServers=127.0.0.0/8,10.6.6.17
before was just:
MasterServers=127.0.0.0/8
and problem is SOLVED! super Thank You :_)