You're in an unenviable position. Mainly because of the distance separating you from your daughter. No matter what you say and do you know that she can go and do the opposite.

Perhaps spending time in an online chat can help, preferably with a camera for better communication. Talk to her as a peer, a friend, an acquaintance; anything but her mother.

Keep the lines of communication open. Don't question her every time hear a complaint about her.

And email her regularly with simple banter and funny stuff, anything other than the usual how's school, home, relatives, etc. Talk to her about music and life, sports and TV, men and women. You know...

Best of luck, and bless her.