Fireball script is not working online?

Yep, this is like my 5th question about a fireball script. Anyways, this script works PERFECTLY fine in Play solo, but doesn't shoot online. It just takes Mana away ;-; I've tried everything that I thought would fix it. Script, (Ignore mana stuff)

Player = game.Players.LocalPlayer -- Gets LocalPlayer 
Character = Player.Character -- Gets Players Character 
Mouse = Player:GetMouse() -- Gets players Mouse 
function onKeyDown(key) 
    key = key:lower() 
    if key == "q" then
        if Player.Magic.Value == "Fire" then
            if Player.Mana.Value >= 15 then
                Player.Mana.Value = Player.Mana.Value - 15
                local x = Instance.new("Part") 
                x.TopSurface = "Smooth"
                x.BottomSurface = "Smooth" 
                x.Shape = "Ball" 
                x.Transparency = .7
                x.BrickColor = BrickColor.new("Bright red") 
                local f = Instance.new("Fire") 
                f.Parent = x 
                f.Size = 12 
                f.Heat = 0
                local o = Instance.new("StringValue", x)
                o.Name = "Owner"
                o.Value = Player.Name
                game.ReplicatedStorage.DMGSCRIPTS.FBDmg:Clone().Parent = x
                local y = Instance.new("BodyVelocity") 
                y.maxForce = Vector3.new(math.huge, math.huge, math.huge)
                y.velocity = Character.Torso.CFrame.lookVector*80
                y.Parent = x  
                x.Parent = workspace 
                x.CFrame = Character.Torso.CFrame*CFrame.new(0, 0, -12)
            end
        end
    end 
end 
Mouse.KeyDown:connect(onKeyDown)

Any help would be appreciated.