I don't know why my script don't work

[Apap303]

someone can help me i don’t know why player speed is not changing on crouch

Script in ServerScriptService

local ReplicateStorage = game:GetService("ReplicatedStorage")

local Remotes = ReplicateStorage:WaitForChild("Remotes")

local Events = Remotes:FindFirstChild("Events")

local Mechanics = Events:FindFirstChild("Mechanics")
local Surviving = Events:FindFirstChild("Surviving")

local RespawnPosition = game.Workspace:WaitForChild("Respawn").RespawnPoint

Surviving.Died.OnServerEvent:Connect(function(player,reason)
	
	print(player.Name .. " died by " .. reason)
	
	player.CharacterAdded:Connect(function(character)
		
		repeat wait() until character.HumanoidRootPart
		
		character.HumanoidRootPart.CFrame = RespawnPosition.CFrame
		
	end)
end)

Mechanics.Crouch.OnServerEvent:Connect(function(player)
	
	print(player.Name .. " Crouched")
	
	player.CharacterAdded:Connect(function(character)
		character:WaitForChild("Humanoid").WalkSpeed = 8
	end)
end)

LocalScript in StarterGui

local Player = game.Players.LocalPlayer

local InputServ = game.UserInputService

local Mechanics = game:GetService("ReplicatedStorage"):WaitForChild("Remotes"):FindFirstChild("Events").Mechanics

InputServ.InputBegan:Connect(function(input)
	if (InputServ:GetFocusedTextBox()) then
		return; -- make sure player's not chatting!
	end
	if input.KeyCode == Enum.KeyCode.C  or input.KeyCode == Enum.KeyCode.LeftControl then
		Mechanics.Crouch:FireServer()
		return
	end	
	if input.KeyCode == Enum.KeyCode.V  or input.KeyCode == Enum.KeyCode.LeftAlt then
		Mechanics.Crawl:FireServer()
		return
	end	
	if input.KeyCode == Enum.KeyCode.LeftShift then
		Mechanics.Sprint:FireServer()
		return
	end	
end)

[RoBoPoJu]

Your current crouch code changes the walkspeed of the player when the player respawns. If you want to change it for the player’s current character, this should do that.

Mechanics.Crouch.OnServerEvent:Connect(function(player)
	
	print(player.Name .. " Crouched")
	
	local character = player.Character or player.CharacterAdded:Wait()
	character:WaitForChild("Humanoid").WalkSpeed = 8
end)