Multiserver master migration issue

Hi,
here is the scenario:
server1 -> master server with web and database
server2 -> slave with mail server
server3 -> new master server (server1 replacement).

I bought the "migration toolkit" and run to copy data from server1 to server 3 (after I configured it and installed ispconfig).
On server 2 I launched ispconfig_update.sh --force and reconfigured master (in my ispconfig "config.inc.php" I have now server3).

My new master (server3) can't communicate with server2.
If I make a change on server3 to a mailbox, doesn't trigger the update (the red dot).
If I make a change instead on website on server 3, it trigger the update.

Any suggestion?
Thank you,
Marco.

 

In my /etc/hosts I have already set the ip and hostname.
On slave when I launch: /usr/local/ispconfig/server/server.sh
I get "finished server.php." with no error.

I don't understand why on new master server the update don't trigger the red dot with number.
Is it linked to server2 or it's something due to master settings?

 

So I updated the server table id with the same of sys_datalog table.
Now It trigger the update (red dot) but it's stuck.
No entries for server2 in ispconfig log.

 

Eureka! Now the changes are propagated to server2.
Thank you for support.
Marco.