Why Wont This Pathfind Script Work?

local p=game:GetService("PathfindingService")
local nodes={}
for _,v in pairs(workspace:GetChildren())do
    if v.Name=="Node"then
        nodes[#nodes+100]=v
    end
end
function findNearestTorso(pos)
    local list = game.Workspace:FindFirstChild(script.Parent.TargetPlayer.Value)
    local torso = nil
    local dist = script.Parent.Dist.Value
    local temp = nil
    local human = nil
    local temp2 = nil
    for x = 1, #list do
        temp2 = list[x]
        if (temp2.className == "Model") and (temp2 ~= script.Parent) then
            temp = temp2:findFirstChild("Torso")
            human = temp2:findFirstChild("Humanoid")
            if (temp ~= nil) and (human ~= nil) and (human.Health > 0) then
                if (temp.Position - pos).magnitude < dist then
                    torso = temp
                    dist = (temp.Position - pos).magnitude
                end
            end
        end
    end
    return torso
end
function setPATH()

            for _,v in pairs(workspace:GetChildren()) do
                if v.Name=="FAKE" then v:remove() end
            end
            local target=findNearestTorso(script.Parent.Torso.Position)
            if target~=nil then
            local path=p:ComputeRawPathAsync(script.Parent.Torso.Position,target.Position,100)
            print(path.Status)
            if path.Status==Enum.PathStatus.Success then
                local points=path:GetPointCoordinates()
                for _,v in pairs(points) do
                    cast=Instance.new("Part",workspace)
                    cast.Size=Vector3.new(1,1,1)
                    cast.CanCollide=false
                    cast.Anchored=true
                    cast.Name="Path"
                    cast.Position=v
                    cast.Transparency = 0
                    setback=0
                        repeat wait() if setback==5 then break end setback=setback+1 script.Parent.Zombie:MoveTo(cast.Position) until (script.Parent.Torso.Position-cast.Position).magnitude<3
                        cast:remove()
                        if v.Y>=script.Parent.Zombie.Torso.Position.Y+1 then
                            script.Parent.Zombie.Jump=true
                        end
                        wait()
                        if (script.Parent.Zombie.WalkToPoint-v).magnitude>20 then wait(1) end
                        end
            else
                script.Parent.Zombie:MoveTo(script.Parent.Torso.CFrame*Vector3.new(0,0,5))
            end
            end
            wait()
            setPATH()
end
setPATH()

this script is in a NPC and it is a Pathfind script. i want the NPC to follow the player whos name is in the TargetValue in the NPC but this will not work at all. where am i going wrong?