Error #1010 re: layer name

In a class I am loading a multi-layered movieclip (MC) that sits in the library by using its linkage (MCL):

var myMc = new MCL();

Once I have the movieclip loaded, I want to make the “Invisible” layer invisible until later. So I use…

myMc.Invisible.visible = false;

This results in:

[FONT=Courier New]TypeError: Error #1010: A term is undefined and has no properties.[/FONT]
[FONT=Courier New]at MyClass/::init()[/FONT]
[FONT=Courier New]at flash.display:DisplayObjectContainer/addChild()[/FONT]
[FONT=Courier New]at visibleLayer_fla::MainTimeline/visibleLayer_fla::frame1()[/FONT]

[FONT=Courier New][FONT=Verdana]I’ve seen this work in tutorials but I cannot get it to work myself. Any suggestions?[/FONT][/FONT]

[FONT=Courier New][FONT=Verdana]Thanks![/FONT]