There isn't a setting specifically for the external eye, but I'm not certain that it will work regardless. The Control IR input is generally meant for use with a BeoSystem 1/2/3, and I don't know that it is wired appropriately for the B&O external eye. But, to be thorough, have you tried using the remote with the Plasma turned off, and ensured that it works directly with the BeoCenter 2 before attaching the eye? It is just possible that it has gone into Option 0.
Russ
We kid because we love.
Bang & Olufsen Tysons Galleria
McLean, VA USA