apple tv and macbook pro streaming issues

Hi

I am running OS X 10.8.5 and after the new update on Apple TV I am not able to stream music from my macbook pro via AirPlay using Apple TV. Does anyone know what`s wrong?

Using Apple TV on my IOS 7 - iPhone5 works fine, but streaming spotify from my macbook pro via Airplay on the Apple TV just doesn`t work. If anyone have any idea what to do, please share the knowledge.

Thanks in advance.