Script Isn't functioning correctly?

game:GetService("Players").PlayerAdded:Connect(function(player) --<this line doesnt work
    print("got past player added function") --doesnt print
    while true do   
        wait()
        if player:WaitForChild("leaderstats").Deaths.Value == 0 then --can't divide by 0 
            script.Parent.Text = player:WaitForChild("leaderstats").Kills.Value
        elseif player:WaitForChild("leaderstats").Deaths.Value >= 1 then
        end 
    end
    while true do
        local kdr = player:WaitForChild("leaderstats").Kills.Value/player:WaitForChild("leaderstats").Deaths.Value
        wait()
        if string.len(kdr) >= 5 then
            script.Parent.Text =string.sub(kdr,1,5)
        elseif string.len(kdr) <= 4 and string.len(kdr) ~= 1 then
            script.Parent.Text = "Ratio"..kdr
        elseif string.len(kdr) == 1 and player:WaitForChild("leaderstats").Deaths.Value ~= 0 then
            script.Parent.Text = "Ratio"..kdr
        end
    end
end)