Event only sometimes fires?

Script 1:

local DSS = game:GetService("DataStoreService"):GetDataStore("WinsSave")
local Matchtime = Instance.new("IntValue", workspace)
Matchtime.Name = "Matchtime"
Matchtime.Value = 1
game.ReplicatedStorage.MatchBegan:Fire(Matchtime)

Script 2:

game.ReplicatedStorage.MatchBegan.Event:Connect(function(Matchtime)
    Matchtime.Value = 30
    while Matchtime.Value > 0 do
        wait(1)
        Matchtime.Value = Matchtime.Value - 1
    end
    print("Let the games begin")
end)

The event will sometimes fire, and sometimes not. I've tried adding waits and waitforchild commands, but nothing seems to fix this issue.