Airplay to new Apple TV3 mouse/curser is blocked on the right side of screen
I have a 13'' Macbook pro late 2013
When I airplay to my new apple tv the mouse or the curser on the screen will only move on the left side of the screen. Or ,it acts like there is a wall in the middle the screen that prevents it from going anywhere on the right side of screen. When I use the track pad to move to the right it stops near the middle and won't go anywhere on the right side.....strange. Can someone help with this
Thanks
MacBook Pro (Retina, 13-inch, Late 2013), OS X El Capitan (10.11.3), Apple TV 64GB