Airplay mirroring ATV2 with 4.4.4 does not work

I installed mountain lion and I see the Airplay icon on top of my screen, however I can’t see my apple tv 2 (JB). When I enter iTunes, there I can select my ATV. Someone any idea what the reason can be? Do I have to update the ATV Software? 

This was bought up in another thread, and the answer that resolved the issue was to update the ATV2 to the latest 5.0.2 firmware.

Thanks!