Why detect script not working with ChildAdded ?

Idk what is the problem

local Stars = workspace:WaitForChild("Stars")
local StarValue = game:GetService("ReplicatedStorage"):WaitForChild("Stars")
local function Check()
    for _, thing in pairs(Stars:GetChildren()) do
        if thing.ClassName == "Model" then
            for __, Star in pairs(thing:GetChildren()) do
                if Star.ClassName == "UnionOperation" then
                    StarValue.Value = StarValue.Value +1
                    print(StarValue.Value)
                end
            end
        end
    end
end

Stars.ChildAdded:Connect(function(m)
    if m:IsA("Model") then
        Check()
    end
end)