It doesn't matter whether you've tried ten times before, or never even given it a shot, you can be free. I've seen countless people who felt they were trapped, and didn't have the willpower to stop, but were still successful after our sessions together.
One thing I will say, though, is make sure you're ready to stop and that you're doing it for YOU. It doesn't work when looking for a magic trick or hoping you might be cured against your will. However, if you are determined to stop, and feel the time is right, there's no reason why I can't help you become a non-smoker in just 2 sessions.