Makejoints and position spawn problems. any idea?

idk whats wrong with this but the model "Businessman" keeps breaking joints. At the first cloning of the model its doesnt break but as soon as it cloned another and so on it breaks the joints and its not spawning at the Part called "Part".

local hey = workspace.Value.Value

function yeap()

hey = hey +1
print("its doing fine")
end
function nope()
for i=1,hey do
wait()
game.ServerStorage["Businessman"]:Clone().Parent = game.Workspace.Part
game.Workspace.Part.Businessman:MakeJoints()
end
end

function done()
print("its working")
yeap()
wait(1)
nope()
end
wait(1)
for i=1,10 do
done()
end

It is part.****Position not Part as parent

local hey = workspace.Value.Value

function yeap()

hey = hey +1
print("its doing fine")
end
function nope()
for i=1,hey do
wait()
local NPC = game.ServerStorage["Businessman"]:MakeJoints()--.Parent = game.Workspace.Part remove this
NPC:MoveTo(game.Workspace.Part.Position)
end
end

function done()
print("its working")
yeap()
wait(1)
nope()
end
wait(1)
for i=1,10 do
done()
end

Or just use one of mine.

army = game.Lighting.Zombie--change to where your NPC is
while true do
	if game.Workspace.zomval.Value <= 25 then--limit and put an intvalue in workspace
	local model = army:clone()
	model.Parent = game.Workspace.zom
	model:MakeJoints()
	model:MoveTo(game.Workspace.zomspawn1.Position)--zomspawn1 = your spawn location for NPC
	game.Workspace.zomval.Value = game.Workspace.zomval.Value + 1
	wait(10)
	else
		print("Can't spawn zombie")
		wait(1.1)
	end
end

Here is the link to two games I use this on,

http://www.roblox.com/games/247431974/The-Bloxing-Dead

and

http://www.roblox.com/games/230388896/The-Last-Hope