Mob Will Hit once, Then wont hurt?

So... This may sound complicated but, I've scripted this Mob and it attacks you etc... But when it goes to attack you.. it doesnt do anything but play the hit animation once but never hurts the player... any ideas? I'm trying to explain this the best i can, If you need more information. Just ask me! :) heres the script code:

local humanoid = script.Parent:WaitForChild("Humanoid")
local torso = script.Parent:WaitForChild("Torso")
local head = script.Parent:WaitForChild("Head2")
local real_head = script.Parent:WaitForChild("Head")
local linked_sword = script.Parent:WaitForChild("Linked_Sword")
local settings = script.Parent:WaitForChild("Settings")
local events = {}
local damage_sounds = {181268610,181268607,181268605}
local hats = {}


--- animations storage ---
local animation_walk = Instance.new("Animation")
animation_walk.AnimationId = "http://www.roblox.com/asset/?id=180426354"
local running_animation_walk = nil

local animation_attack = Instance.new("Animation")
animation_attack.AnimationId = "http://www.roblox.com/asset/?id=361958918"
local running_animation_attack = nil

--------------------------




function load_hat(id)
local new_hat = game:GetService("InsertService"):LoadAsset(id)
	for i,v in ipairs(new_hat:GetChildren()) do
		if(v.ClassName == "Hat") then
		v.Parent = script.Parent
		end
	end
new_hat:Destroy()
end


Instance.new("ForceField",script.Parent)
--load_hat(hats[math.random(1,#hats)])
	for i = 1,2 do
	wait(0.5)
	humanoid.MaxHealth = settings.Health.Value
	humanoid.Health = settings.Health.Value
	end
script.Parent.ForceField:Destroy()
humanoid.MaxHealth = settings.Health.Value
humanoid.Health = settings.Health.Value




function sound(id,parent,pitch,volume,remove_time)
local sounde = Instance.new("Sound",parent)
game.Debris:AddItem(sounde,remove_time)
sounde.SoundId = "http://www.roblox.com/asset/?id=" .. id
game:GetService("ContentProvider"):Preload(sounde.SoundId)
sounde.Pitch = pitch
sounde.Volume = volume
sounde:Play()
return (sounde)
end





function hurt (human)
	if(human) then
		if(human.Health ~= 0 and human.Parent:FindFirstChild("Torso")) then
		human.Health = human.Health - settings.Damage.Value
		local random_sound_effect = damage_sounds[math.random(1,#damage_sounds)]
		sound(random_sound_effect,human.Parent.Torso,math.random(70,100)/100,1,2)
		end
	end
end




function attack (human)
game:GetService("ContentProvider"):Preload(animation_attack.AnimationId)
sound(181268614,linked_sword.Handle,math.random(90,110)/100,1,2)
	if(running_animation_attack == nil and human.Health ~= 0) then
	local event_keyframe_reached
	running_animation_attack = humanoid:LoadAnimation(animation_attack)
	running_animation_attack:Play()
		event_keyframe_reached = running_animation_attack.KeyframeReached:connect(function(keyframeName) -- Bind function to KeyframeReached event
			if (keyframeName == "Hit") then
			hurt(human)
			
			elseif(keyframeName == "End") then
			running_animation_attack:Stop()
			running_animation_attack = nil
			event_keyframe_reached:disconnect()
			end
		end)
	
	repeat wait(0.05) until running_animation_attack == nil
	end
end




function walk(operation)
game:GetService("ContentProvider"):Preload(animation_walk.AnimationId)
	if(operation == true and running_animation_walk == nil) then
	running_animation_walk = humanoid:LoadAnimation(animation_walk)
	running_animation_walk:Play()
	
	
	elseif(operation == false and running_animation_walk ~= nil) then
	running_animation_walk:Stop()
	running_animation_walk = nil
	humanoid:MoveTo(torso.Position,torso)
	end
end





function loot_player_items(stat_holder)   --- give a stat_holder and you will have a chance of getting loot
local looted = 0
	if(stat_holder:FindFirstChild("Inventory")) then
		for i,v in ipairs(settings.Possible_Items:GetChildren()) do
		wait()
			if(looted < 3.1 and math.random(0,10000) < (v.Value*100)) then
			stat_holder.Inventory.Value = stat_holder.Inventory.Value .. ":" .. v.Name .. ":"
			looted = looted + 1
			
			elseif(looted > 1.9) then
			break
			end
		end
	end
end






function follow(plr,char,dist)
	if(plr and char) then
		if(dist <= settings.Attack_Distance.Value and char:FindFirstChild("Humanoid")) then
		walk(false)
		attack(char.Humanoid)
		
		
		elseif(char:FindFirstChild("Humanoid") and dist > settings.Attack_Distance.Value) then
		walk(true)
		script.Parent.Humanoid:MoveTo(char.HumanoidRootPart.Position,char.HumanoidRootPart)
		end
	
	else
	walk(false)
	end
end






events[#events + 1] = humanoid.Died:connect(function()
sound(12222242,head,1.1,0.8,2)
real_head.Surprise:Destroy()
animation_walk:Destroy()
animation_attack:Destroy()
	for i,v in ipairs(humanoid:GetChildren()) do    ---- Giving players items and gold, rewarding
		if(game.ServerStorage:FindFirstChild(v.Name .. "Stats")) then
		local stat_holder = game.ServerStorage:FindFirstChild(v.Name .. "Stats")
			if(stat_holder:FindFirstChild("Gold")) then
			stat_holder.Gold.Value = stat_holder.Gold.Value + settings.Gold.Value
			end
			if(stat_holder:FindFirstChild("EXP")) then
			stat_holder.EXP.Value = stat_holder.EXP.Value + settings.EXP.Value
			end
			if(stat_holder:FindFirstChild("ClanPoints")) then
			stat_holder.ClanPoints.Value = stat_holder.ClanPoints.Value + settings.Clan_Points.Value
			end
		loot_player_items(stat_holder)
		end
	end  --- done rewarding players
game.Debris:AddItem(script.Parent,3.5)
	for i = 1,#events do
	events[i]:disconnect()
	end
end)







while wait() do
local dist = 45
local target = nil
local target_char = nil
	for i,v in ipairs(game.Players:GetChildren()) do
	wait()
		if(v.ClassName == "Player") then
			if(v.Character) then
				if(v.Character:FindFirstChild("HumanoidRootPart")) then
					if((v.Character.HumanoidRootPart.Position - script.Parent.HumanoidRootPart.Position).Magnitude < dist) then
					dist = (v.Character.HumanoidRootPart.Position - script.Parent.HumanoidRootPart.Position).Magnitude
					target = v
					target_char = v.Character
					end
				end
			end
		end
	end
follow(target,target_char,dist)
wait(settings.Fire_Speed.Value)
end