Don't know anything about the Horizon and/or the Beoremote One BT, but on the drawing below you will find the excact position of the ir receiver on an ATV2.

Hi

I have tried different PUC-ports, tried 1A, 1B, 2A and 2B. No one works. can't get a blaster signal. Any clues?

So the cable works, i seem to get a signal through. it flashes when i press a button on the Beoremote.

Then the problem should be with the placement of the sensor? I tried the one in the picture above, does not work.... ? 

Maybe a stupid question, but did your BV notice the Apple TV during set up and did it subsequently download the software needed to let the PUC work?

Thank you Casperl for that great suggestion! Now it works!

And thanks to everybody else who has helped me with this 🙂 🙂 🙂

In general with PUC I have found that if the IR blaster is directly on top of the IR sensor its not as successful as if it is just slightly offset. 

I did however use the new ATV (yes I said I would never get one lol) with my Sony TV and it works with the ATV remote.  I don't even need the Sony remote now AND no PUC cables (not that they use puc).... I must try this out when I get home with the B&O...

Which reminds me I think I will need to order the new bracket from STB for my new ATV.