Loader Object issue

programming flash
1

Hello, does anyone know why I would be getting an error with my loader objects in flash. I have multiple loaded swf files and I get this error 2025-everything still works fine even though I get this error.
**Error #2025: The supplied DisplayObject must be a child of the caller.at flash.display:isplayObjectContainer/removeChild()
at Techwebpage1_fla::MainTimeline
**
happens over and over as I click on a new file to be loaded.

Below is a snippet of my code. I am no expert or programmer just learning
still. Any help or advice would be greatly appreciated.
Easch loader object works fine except the error.

CODE BELOW
[COLOR=Silver]
//loader 1[/COLOR]
var myRequest38:URLRequest = new URLRequest(“sisil_website.swf”);
sisilWebsite_btn.addEventListener(MouseEvent.MOUSE _UP, loadb38);
function loadb38(event:MouseEvent):void {
myloader.load(myRequest38);
stage.addChild(myloader);
myloader.x=300;
myloader.y=145;
myloader.scaleX=1;
myloader.scaleY=1;
}

[COLOR=Silver]//loader 2[/COLOR]
var myRequest39:URLRequest = new URLRequest(“mbanners.swf”);
microsoft_btn.addEventListener(MouseEvent.MOUSE_UP , loadM39);
function loadM39(event:MouseEvent):void {
myloader2.load(myRequest39);
stage.addChild(myloader);
myloader.x=350;
myloader.y=145;
myloader.scaleX=1;
myloader.scaleY=1;
}