More Hat Giver help please?

I made a hat script that works if you step on a block, it gives you a hat

debounce = true

function onTouched(hit)
    if (hit.Parent:findFirstChild("Humanoid") ~= nil and debounce == true) then
    debounce = false
    local h = Instance.new("Hat")
    local p = Instance.new("Part")
    local d = Instance.new("Decal")
    d.Parent = p
    d.Texture = "http://www.roblox.com/asset/?id=306287357"
    local d1 = d:Clone()
    d1.Parent = p
    d1.Face = ("Back")
    h.Name = "Galalaga"
    p.Name = "Galalaga"
    d.Name = "Galalaga"
    p.Parent = h
    p.Transparency = 1
    p.Position = hit.Parent:findFirstChild("Head").Position
    p.Name = "Handle"
    p.FormFactor = ("Custom") 
    p.Size = Vector3.new(1,1,0.2) 
    p.BottomSurface = 0 
    p.TopSurface = 0 
    p.Locked = true 
    h.Parent = hit.Parent
    h.AttachmentPos = Vector3.new(0,-0.75,0)
    wait(5)
    debounce = true
end
end
script.Parent.Touched:connect(onTouched)

the script works perfectly until I try to make it work with an image button

debounce = true

function onTouched()
        if (script.Parent.Parent.Parent.Parent:FindFirstChild("Humanoid") ~= nil and debounce   == true)    then
    debounce = false
    local h = Instance.new("Hat")
    local p = Instance.new("Part")
    local d = Instance.new("Decal")
    d.Parent = p
    d.Texture = "http://www.roblox.com/asset/?id=306287357"
    local d1 = d:Clone()
    d1.Parent = p
    d1.Face = ("Back")
    h.Name = "Galalaga"
    p.Name = "Galalaga"
    d.Name = "Galalaga"
    p.Parent = h
    p.Transparency = 1
    p.Position = script.Parent.Parent.Parent.Parent:findFirstChild("Head").Position
    p.Name = "Handle"
    p.FormFactor = ("Custom") 
    p.Size = Vector3.new(1,1,0.2) 
    p.BottomSurface = 0 
    p.TopSurface = 0 
    p.Locked = true 
    h.Parent = script.Parent.Parent.Parent.Parent
    h.AttachmentPos = Vector3.new(0,-0.75,0)
    wait(5)
    debounce = true
end
end
script.Parent.MouseButton1Down:connect(onTouched)