Radio script not working correctly?

Hello! This script I used to make a Radio isn't fully working, since messages I send are not always shown to other people... could anyone help me?

I have a Chatstorage folder in workspace and a ChatHandler script too. Plus of course a GUI for the Radio, here are the scripts.

ChatHandler in workspace.

local chatstorage = game.Workspace.Chatstorage

game.Players.PlayerAdded:Connect(function(plr)
    plr.Chatted:Connect(function(theirmessage)
        local stringval = Instance.new("StringValue", chatstorage)
        stringval.Name = "["..plr.Name.."] "..theirmessage
    end)
end)

In Radio GUI.

local chatbox1 = script.Parent.Parent.Chat.CB1
local chatbox2 = script.Parent.Parent.Chat.CB2
local chatbox3 = script.Parent.Parent.Chat.CB3
local chatbox4 = script.Parent.Parent.Chat.CB4
local chatbox5 = script.Parent.Parent.Chat.CB5
local chatbox6 = script.Parent.Parent.Chat.CB6
local chatbox7 = script.Parent.Parent.Chat.CB7
local chatbox8 = script.Parent.Parent.Chat.CB8

game.Workspace.Chatstorage.ChildAdded:Connect(function(chatstuff)
    script.Sound:Play()
    chatbox1.Text = chatbox2.Text
    chatbox2.Text = chatbox3.Text
    chatbox3.Text = chatbox4.Text
    chatbox4.Text = chatbox5.Text
    chatbox5.Text = chatbox6.Text
    chatbox6.Text = chatbox7.Text
    chatbox7.Text = chatbox8.Text
    chatbox8.Text = chatstuff.Name
wait(0.1)
end)