why is my fire ball not working?

http://www.roblox.com/item.aspx?id=320509215

--hi this is my second script wish lucky from Taleofhelper

local player = script.parent.parent
local mouse = player:GetMouse()
enabled =false

function onKeyDown(key)
	key = key:lower()
	if key == "q" and not enabled then --f for fireball
		enabled = true
		fireball = Instance.new("Part")
		fireball.Shape = "Ball"
		fireball.BrickColor = BrickColor.new("Really red")
		fireball.Transparency = 0.3
		fireball.Topsurface = "smooth"
		fireball.BottomSurface = "smooth"
		fireball.CFrame = player.Character.Torso.CFrame *CFrame.new(0,0,-5)
		fireball.Parent = game.Workspace
		local mesh = Instance.new("SpecialMesh",fireball)
		mesh.MeshType = "Sphere"
		local fire = Instance.new("Fire",fireball)
		fire.Heat = 8
		fire.Size = 10
		local bv = Instance.new("bodyvalocity")
		bv.maxForce = Vector3.new(math.huge,math.huge,math.huge)
		bv.velocity = player.Character.Torso.CFrame.lookVector*80
		for i = 1,13 do
			fireball.Mesh.scale = fireball.Mesh.Scale +Vector3.new(0.1,0.1,0.1)
			wait()
		end
		bv.parent = fireball
		fireball.Cancollide = false
		wait(1)
		enabled = false
		wait(9)
		fireball:Destroy()
	  end
end

mouse.KeyDown:connect(onKeyDown)
		
		

In line 24, BodyVelocity is misspelled.

I think it should be:

local bv = Instance.new("BodyVelocity")

Maybe that will help? You may have to capitalise Velocity in line 26 as well, I'm unsure.

Also, I think this form of keyboard input is deprecated. I find this one easier to use anyhow:

http://wiki.roblox.com/index.php?title=Keyboard_input