I can not get this comments_txt to tell me any different size
comments_txt.autoSize=ture;

so some should be sort and some maybe long. but its always the same size
If its a long text it should change the height to fit

and this line would then work the way it needs to
comment_mc.comment_item["comment" + i]._y = comment_mc.comment_item["comment" + i].comments_txt.textHeight * i;

how do i get the different text hight size on autoSize to change the comment_txt size?

Actionscript Code:
comment_mc.comment_item.comment.duplicateMovieClip("comment" + i, i);
        comment_mc.comment_item["comment" + i].ID = i;
        comment_mc.comment_item["comment" + i]._y = comment_mc.comment_item["comment" + i].comments_txt.textHeight * i;
        comment_mc.comment_item["comment" + i].name_txt.text = name[i];
        trace(comment_mc.comment_item["comment" + i].comments_txt.htmlText = text[i]);
        comment_mc.comment_item["comment" + i].comments_txt.htmlText = text[i];
        comment_mc.comment_item["comment" + i].comments_txt.html = true;