Change Position

Some of my photo is in Vertical and some is in horizontal. So, for vertical, I want the moviecliploader to be rotated 90 degree. However, the position of moviecliploader changed. So, I added extra 2 line of code as below to move the moviecliploader to it's original location, but why is it still remain the same as the code is not applied?

this["PhotoLoader"+i].loadMovie("PhotoThumbnail.swf");
this["PhotoLoader"+i]._rotation=90
this["PhotoLoader"+i]._x=this["PhotoLoader"+i]._x+10;
this["PhotoLoader"+i]._y=this["PhotoLoader"+i]._y-10;