onMouseMove? why won't it work?

help! I am using the onMouseMove command inside a small movie. It works fine. this is it below.

animation.onMouseMove = function(){
mousedist=_xmouse-oldXmouse;
oldXmouse=_xmouse;
//speed = 5
if(mousedist>0)_level0.animation.nextFrame();
if(mousedist<0)_level0.animation.prevFrame();
};

BUT when I load the .swf into a bigger .swf movie with loadmovie command it doesn’t work anymore. that is, the animation doesn’t move when the mouse moves.
any ideas why?
below is loadMovie command.

wave_btn.onRelease = function() {
_root.generic_mc._x = 0;
_root.generic_mc.loadMovie(“emwaves.swf”);

_level10 is the default level when you load stuff in, use that instead of _level0

thanx yeldarb, but it didn’t work.
Did i mention I’m loading the external swf into an empty movie clip? does this matter?
any other ideas?
m

thanx yeldarb. problem solved. I got rid of the _level altogether.
m