Planes not lining up on runway

For various reasons I had to reload fs2002 and now when my planes load they are not center line on runway. All planes are this way ,the nose gear is to the left of line. I've not had this problem before. All my planes want to run off of the left of the runway if I don't correct. I realize that some prop planes naturaly want to go left, but I've not had this problem with jets. Does one of you gurus have a fix for this? It seems I've seen it discussed on the forum in the past , but I can't seen to find it.