Player.NickName doesn't work for me

Player.NickName doesn't work for me, and that's the on used in the setup tutorial! Whjat do i do?
edit: here's the code that doesn't work:

public void OnPlayerLeftRoom( Player other  )
		{
			Debug.Log( "OnPlayerLeftRoom() " + [i]other.NickName[/i] ); // seen when other disconnects
                }