How easily they go astray

I had previously posted that my step-daughter and I had finally reached a wonderful relationship. That has all gone to _ell! I don't know what happened or how it happened, but she wants nothing to do with her father and I. I love her, but am so frustrated with her. We sent her to school and she quit 1 yr short of graduating, and has decided not to have any contact with us. The last time I talked with her was December 25 of 08. I ask myself all the time, were we to hard on her? Did we not help like we should have. Then I get angry! I have another daughter that had some really bad things happen with her, but now she is soaring high in the sky. One I thought would be no problem and one I thought would be. Lord, you just never know!