What isn't working here?

local cashvip = 254637214
local orbitalvip = 254911738


function hascash(player) -- checks to see if the player owns your pass
    return game:GetService("MarketplaceService"):PlayerOwnsAsset(player, cashvip)
end
function hasorbital(player) -- checks to see if the player owns your pass
    return game:GetService("MarketplaceService"):PlayerOwnsAsset(player, orbitalvip)
end

game.Players.PlayerAdded:connect(function(plr)
    if hascash(plr) then
     local sparkles = Instance.new("ParticleEmitter")
sparkles.Parent = script.Parent.Torso
sparkles.Texture = ("http://www.roblox.com/asset/?id=243891919")
sparkles.Rotation = NumberRange.new(0,90)
sparkles.RotSpeed = NumberRange.new(1,8)
local Color1 = Color3.new(0,255,0)
local Color2 = Color3.new(0,85,0)
sparkles.Color = ColorSequence.new(Color1,Color2)
sparkles.VelocitySpread = 30
sparkles.Speed = NumberRange.new(5,8)
sparkles.Size = NumberSequence.new(0.5,0.6,0.5,0.6,0.5)
sparkles.Lifetime = NumberRange.new(1)
sparkles.Rate = 50
    end
if hasorbital(plr) then
 script.Parent.Humanoid.Walkspeed = 20
 script.Parent.Humanoid.MaxHealth = 125
 script.Parent.Humanoid.Health = 125
end

if game.Players.PlayerAdded.IsInGroup(2587858)then
 local fire = Instance.new("Fire")
 fire.Parent = script.Parent.Torso
 fire.Color = Color3.new(0,0,0)
 fire.SecondaryColor = Color3.new(0,0,0)
end
end)

i've tried making script.Parent into game.Players.LocalPlayers.Character... but it still doesnt work! please help :(

Basically, what the script is supposed to do is if you have the cashvip gamepass, it gives you green sparkles on your body. If you have orbital vip, then it makes you have a walkspeed of 20 and health of 125, and if you're in the group, you're supposed to have white fire in your body.

The output tells me nothing is wrong on both studio and on server.