To better explain this let me use an example: I could gamble with you saying that I will throw a coin and if it scores an Head I will win. That way i have a 50% possibility to win and a 50% possibility to lose.
Now let's say that before playing I threw my coin a lot of times, until I had a complete serie of 5 Tails on a row. Do you think that now I should have more possibility to win against you getting an Head? Not at all, because the next throw will have again the usual 50/50 possibility