[ HELP]how can i change the cordiantes of a MC?

ok i have this code on a button.....

----------

on (release) {
_root.createEmptyMovieClip("myMC1",0);
myMC1._x = 275;
myMC1._y = 200;
loadMovie("dw1.swf", myMC1);
}

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and i keep on changing the cordnates to many diff. numbers but it always stays in the same place what do i do????

on the attached file -

click on artists
then click on H2boss

im trying to get that loadedmovieclip in the box.

HELP!!!!!!!! thank you!!