Lua problem :(

[Warriar]

Well erm I was making a lua and When I put it in the scripts folder It just doesn't load, I go ingame and spawn the npc and it just sits there attacking, Anyone know why? Heres the LUA

function Xenon_OnCombat(pUnit, Event)
pUnit:SendChatMessage(14, 0, "Power, My Men are Addicted to it, It took us months to rebuild this corrupt nation, But I have done it, Haven't I? I will not let you cleanse these lost souls, They are mine! And I vow to take over Azeroth with them!")
pUnit:RemoveEvents()
pUnit:RegisterEvent("xPhase_1", 100, 0)
end

function Xenon_OnDied(pUnit, Event)
pUnit:SendChatMessage(14, 0, "My legacy .. Will run on .. For this is just the begginning of the end! My people will rise, I assure you that!")
pUnit:RemoveEvents()
end

function Xenon_OnLeaveCombat(pUnit, Event)
pUnit:SendChatMessage(14, 0, "Worthless .. All of you!")
pUnit:RemoveEvents()
end

function xPhase_1(pUnit, Event)
if pUnit:GetHealthPct() <= 95 then
pUnit:SendChatMessage(14, 0, "I'll deal with you maggots myself!")
pUnit:RemoveEvents()
pUnit:RegisterEvent("quanstrike", 100, 1) 
pUnit:RegisterEvent("quanstrike", 10000, 0) 
pUnit:RegisterEvent("cosmicsmash", 15000, 0) 
pUnit:RegisterEvent("stormbolt", 11000, 0) 
pUnit:RegisterEvent("groundtremor", 16000, 0) 
pUnit:RegisterEvent("unstableenergy", 20000, 0) 
pUnit:RegisterEvent("lighteninglash", 15000, 0) 
pUnit:RegisterEvent("scorch", 16000, 0) 
pUnit:RegisterEvent("xphase_2, 100, 0)
end
end

function xphase_2(pUnit, Event)
if pUnit:GetHealthPct() <= 40 then
pUnit:SendChatMessage(14, 0, "Come my Minions!, Show these maggots what I can do!")
pUnit:RegisterEvent("quanstrike", 10000, 0)
pUnit:RegisterEvent("xphase_3", 100 ,0)
x = pUnit:GetX()
y = pUnit:GetY()
z = pUnit:GetZ()
o = pUnit:GetO()
pUnit:SpawnCreature(77746, x, y+2, z, o, 14, 12000000000)
pUnit:SpawnCreature(77746, x, y+2, z, o, 14, 12000000000)
pUnit:SpawnCreature(77746, x, y+2, z, o, 14, 12000000000)
end
end

function xphase_3(pUnit, Event)
if pUnit:GetHealthPct() <= 20 then
pUnit:SendChatMessage(14, 0, "The Power Surges Within!")
pUnit:RemoveEvents()
pUnit:RegisterEvent("enrage", 100, 1)
pUnit:RegisterEvent("quanstrike", 100, 1) 
pUnit:RegisterEvent("quanstrike", 10000, 0)
pUnit:RegisterEvent("scorch", 24000, 0)
pUnit:RegisterEvent("xphase_4", 100, 0)
end
end

function xphase_4(pUnit, Event)
if pUnit:GetHealthPct() <= 4 then
pUnit:SendChatMessage(14, 0, "I cannot die! I am immortal!, Wait ... What is this? What is happening!")
pUnit:RemoveEvents()
pUnit:RegisterEvent("immortal", 100, 1)
pUnit:SpawnCreature(77748, x, y+2, z, o, 14, 35000)
pUnit:SpawnCreature(77772, x, y+2, z, o, 14, 35000)
end
end

function quanstrike(pUnit, Event)
pUnit:FullCastSpellOnTarget(64592, pUnit:GetMainTank())
end

function cosmicsmash(pUnit, Event)
pUnit:CastSpell(62311)
end

function stormbolt(pUnit, Event)
pUnit:CastSpell(64649, pUnit:GetRandomPlayer(0))
end

function groundtremor(pUnit, Event)
pUnit:CastSpell(62437)
end

function unstableenergy(pUnit, Event)
pUnit:FullCastSpellOnTarget(62451, pUnit:GetRandomPlayer(0))
end

function lighteninglash(pUnit, Event)
pUnit:FullCastSpellOnTarget(62648, pUnit:GetRandomPlayer(0))
end

function scorch(pUnit, Event)
pUnit:CastSpell(62546)
end

function enrage(pUnit, Event)
pUnit:CastSpell(41447)
end

function immortal(pUnit, Event)
pUnit:CastSpell(13874)
end

RegisterUnitEvent(77753, 1, "Xenon_OnCombat")
RegisterUnitEvent(77753, 2, "Xenon_OnLeaveCombat")
RegisterUnitEvent(77753, 4, "Xenon_OnDied")