I have a Late 2011 model 13' Macbook Pro and i purchased Apple TV because it should support Airplay mirroring. It says i should have the airplay icon on my menu bar but it does not appear.

According to the help page i was viewing my Late 2011 13' MacBook Pro should support Airplay Mirroring. However the airplay icon does not appear on my menu bar like i says it should and when i go to System prefereneces>Display nothing appears there about Mirroring as well (like it says it should). The help page specifically says that Late 2011 MacBook Pros should support Mirroring etc...

Any suggestions? I'm all ears...