I was having similar issues with Ops Console on 7.1. Switched to the new Access Client Solutions - problem solved. That would be my suggestion, especially since ACS is IBM's statement of direction now.
From: Rich Loeber
Sent: Tuesday, December 29, 2015 1:01 PM
I am getting ready to upgrade from 6.1 to 7.1. As instructed, I have
installed IBM i Access For Windows 7.1 in advance of the upgrade to be
able to use the operations console. The console starts just fine (the
server is still running on 6.1) but I cannot get the Remote Control Panel
to display. It was working fine before the upgrade.
Is this something that won't work until the server has been upgraded?
Or, am I missing something.
Kisco Information Systems