When use "loadMovieNum", how to set _x and _y

In the first frame of a empty MC, I use "loadMovieNum(“abc.swf”,1) to load a external movie, and then put this MC into main stage and instance name is “new”, but problem occurs when set _x and _y for this “new”. It is not working when using setProperty(“new”,_x,“20”)

How set _x and _y for that?