Hi.
Thank you. Yes i want to the move the player vertical upwards or downwards.
I eventually discovered that if the player is not in Fly mode then the vertical movement does not work.
So i set the movement mode to flying and then i could control the vertical movement.
http://s30.postimg.org/ed7x8mmht/Vertical.jpg
My confusion was that vertical movement did not work at all. I was not aware that fly mode has to be enabled.