Why? Do I need to do something special on server1?
Is there any multi server documentation yet? I havent found a primer on how it is supposed to work.
Please make sure that you use the same ispconfig version on both servers. So as you use 126.96.36.199 on the primary and then reinstalled the secondary, I guess you used 188.8.131.52 on the secondary and this will not work.
1) Uninstall ispconfig on the secondary.
2) Update the primary to 184.108.40.206
3) Install ispconfig on the secondary again in expert mode.