Unloadclip not working?

1

I have this on first frame on main movie:

stop();
//----------------<MCL>-----------------------------\

var myMCL:MovieClipLoader = new MovieClipLoader();
var myListener:Object = new Object();

myMCL.addListener(myListener);

//-----------------<MCL>---------------------\

// loads trigger and shared library SWFS
myMCL.loadClip(“trigger.swf”,1);

//--------davebutton---------\
this.bios_mc.davebio_mc.onPress = function() {
myMCL.loadClip(“davebio.swf”,1)
}
this.bios_mc.davebio_mc.onRelease = function() {
myMCL.unloadClip(“davebioscroll.swf”);
myMCL.unloadClip(“davecontact.swf”);
}

//--------todbutton---------\
this.bios_mc.todbio_mc.onRelease = function() {
myMCL.unloadClip(“davebioscroll.swf”);
myMCL.unloadClip(“davecontact.swf”);
}

the davebio_mc ( button ) or todbio_mc (button) don’t unload any of the swfs.
Is my AS wrong?

THANK YOU!!!