For some reason my script cannot determine that i am the owner of the game?

For some reason my script cannot determine that i am the owner of the game even though game.CreatorId and plr.UserId are the same

Here is the code:

function module.IsOwner(plr)
    if game.CreatorType == Enum.CreatorType.User then
        if plr.UserId == game.CreatorId then
            return true
        end
    elseif game.CreatorType == Enum.CreatorType.Group then
        if plr:IsInGroup(game.CreatorId) then
            if plr:GetRankInGroup(game.CreatorId) == 255 then
                return true
            end
        end
    end
    return false
end