I have established conection via gateway network.
Status for both gateways is Running
But in Diagnostics tabs I have following information:
When I try to add a remote tag provider I have manualy enter the name of the provider from remote gateway. And after that in the status page of the newly created provider I can see the error message
So I cant understand what is the problem and how to solve it.
This is very similar to this post Remote Tag provider not showing Tag providers
Are you working on the same project?
It is a different projects 
But the problem is the same 
Check your security zones and make sure they are setup properly.
Have you been renaming any of the gateways in question? We've got a ticket with the same error and symptoms and looks to be caused by some bookkeeping issues with the queues during gateway system renames. Do everything start to work correctly again once you restart those gateways?
Yep, that was an issue
I renamed the remote gateway and then restarted just it. After restarting the local gateway the problem was solved
