I pm'd you. Did you get it?
My DD is 22 and I have had the same problem. I went to Toughlove and through therapy, and basically, you just have to ask yourself how much of a doormat you are willing to be. If you have younger children, they are being affected also, make no mistake about it. And it will be years before you know just how badly they are affected now.
Everyone has to grow up sometime and the earlier the better. Law enforcement, therapists, social workers, doctors are worthless (I live in Los Angeles). YOU need to do the dirty foot work, because believe me, I have been there, and no one cares like you do about your own situation.
Drugs are a dangerous thing because even though many people believe that "pot" is harmless, the kind of criminal element that a person is around to acquire the illegal substance is dangerous enough to avoid it.
Know what ressources you have - church, the law, any neighbors, family or friends. Basically, you have yourself
May G-d give you the strength to get through this. E-mail me if you want.