I made a fireball script but the "Fireball" won't move?

I'm trying to make this fireball move but it's not working! This is what I wrote.

local UIS = game:GetService("UserInputService")
local RS = game:GetService("ReplicatedStorage")
local RE = RS.SimpleFireBall

RE.onServerEvent:Connect(function(player)
    local fireBall = Instance.new("Part", workspace)
    fireBall.Anchored = true
    fireBall.Size = Vector3.new(2,2,2)
    fireBall.Shape = "Block"
    local actualFireBall = Instance.new("Part", workspace)
    fireBall.Anchored = true
    fireBall.Size = Vector3.new(2,2,2)
    fireBall.Shape = "Block"
    local plr = player
    local char = plr.Character
    local hum = char.Humanoid
    fireBall.Orientation = char:WaitForChild("Right Arm").Orientation
    fireBall.CFrame = char:WaitForChild("Right Arm").CFrame * CFrame.new(-2,1,-5)
    local Vitesse = Instance.new("BodyVelocity", fireBall)
    Vitesse.Velocity = Vector3.new(0,0,10)
    wait(2)
    fireBall:Destroy()
end)

Please help.