What could be wrong with this script? I am adding this part so it is specific.

So my goal is to use this script to make it so that when you click on a button, an event is fired. That event could make a bunch of options happen. Here is the script: Local script in gui:

local ReplicatedStorage = game:GetService("ReplicatedStorage")
local event = ReplicatedStorage:WaitForChild("RemoteEvent")

script.Parent.MouseButton1Down:connect(function(billnye)
    script.Parent.Parent.Person.Value = script.Parent.Parent.b.Text
    script.Parent.Parent.Parent.yesgui.a.Visible = false
    script.Parent.Parent.Parent.yesgui.b.Visible = false
    script.Parent.Parent.Parent.yesgui.c.Visible = false
    script.Parent.Parent.Parent.yesgui.d.Visible = false
    event:FireServer(script.Parent.Parent.Parent.Attack.ScrollingFrame.AttackDone.Value, game.Workspace:FindFirstChild(game.StarterGui.yesgui.Person.Value), game.Players:FindFirstChild(game.StarterGui.yesgui.Person.Value))
end)

The variables are values that define what you want to happen to other players, one also has the player name that they want to attack.

ServerScriptService script:

local ReplicatedStorage = game:GetService("ReplicatedStorage")
local event = ReplicatedStorage:WaitForChild("RemoteEvent")

local function yesgogo(attack, playerokay, playerokayplay)
    if attack == "Kill" then
        playerokay.Humanoid.Health = 0
    end
    if attack == "Speed" then
        playerokay.Humanoid.WalkSpeed = 100
    end
    if attack == "Slow" then
        playerokay.Humanoid.WalkSpeed = 3
    end
    if attack == "Jail" then
        local jailCopy = game.Workspace.AdminAssets.Jail:Clone()
        jailCopy.Parent = game.Workspace
        jailCopy.Transparency = 0
        jailCopy.CanCollide = true
        jailCopy.Position = Vector3.new(playerokay.HumanoidRootPart.Position.X, playerokay.HumanoidRootPart.Position.Y, playerokay.HumanoidRootPart.Position.Z)
    end
    if attack == "LevelOP" then
        playerokayplay.leaderstats.Level.Value = 100
    end
    if attack == "Reset" then
        playerokayplay.leaderstats.Level.Value = 1
    end
end

event.OnServerEvent:Connect(yesgogo)

I don't know why these don't effect the player. Please help. Thank you.