In my own experience - no amount of therapy, or types of therapy, would help me....until I was ready to do the work myself. No amount of support, be it friends, family, or therapists (psychiatrists, psychologists, counselors) could help, until I was ready to accept it, and do the work myself. I am so sorry to hear that you and your parents are struggling so hard, and keep hitting brick walls. The only possible advice I could give is, follow that link Skeezyks posted. You and your parents can't change your brother, and you can't make him make an effort, and you can't make him stay sober. All you do have the power to do is to find a way of handling what it's doing to you (and your parents.) I pray you all find your way through this time.