Are you sure it is the CORRECT remote, and identical to the original?
I had an AOC from the amenity site a few months ago. I tried four different "universal" remotes, but it would not listen to any of them, so I finally sent off for an AOC replacement. Correct model specified, but that did not work either. I found another supplier with a different looking remote, also for this model, and this one DID work. But you start to doubt yourself!
OldLes.