Gun not changing value?

Hi guys! In my gun script, I am checking the players health and checking if it is 0. I then want to change the value in the workspace "AtLeastOneShot" - for some reason it don't change it :( Any ideas? Thanks

HitHumanoid = FindFirstClass(HitObj.Parent, "Humanoid")
                    HumanoidFound = true
                    if HitHumanoid.Health > 0 then
                        if IsEnemy(HitHumanoid) then
                            local CreatorTag = Instance.new("ObjectValue")
                            CreatorTag.Value = Player
                            CreatorTag.Name = "creator"
                            CreatorTag.Parent = HitHumanoid
                            local ChosenDamage = 0
                            if HitObj.Name == "Head" then
                                ChosenDamage = S.Damage * RAND(HeadVal, HeadVal + 0.1, 0.01)
                            elseif HitObj.Name == "Torso" then
                                ChosenDamage = S.Damage * RAND(ChestVal, ChestVal + 0.1, 0.01)
                            else
                                ChosenDamage = S.Damage * RAND(LimbsVal, LimbsVal + 0.1, 0.01)
                            end
                            HitHumanoid:TakeDamage(ChosenDamage)
                            if HitHumanoid.Health == 0 then game.Workspace.AtLeastOneShot.Value = true
                            end

Not the whole gun script, but the bit needed!