ActionScript 3.0 :: ArgumentError: Error #2025: The Supplied DisplayObject Must Be A Child Of The Caller

I am getting this error

PHP Code:

ArgumentError: Error #2025: The supplied DisplayObject must be a child of the caller.    
at flash.display::DisplayObjectContainer/removeChild()    at MethodInfo-164()

Here is my code just a simple removeChild should work.. but it gives me an error.

PHP Code:

function homeScene2(event:MouseEvent) {trace("button clicked");removeChild(imageText);removeChild(thumbHolder_mc);thumbHolder_mc.removeChild(imageLoader);removeChild(imageLoader);gotoAndStop(1,"1");}

is there a simple way to remove all Children in one shot without so much code like this? Could a simple removeChildren work?

here is a look at the children in the same code..

PHP Code:

addChild(imageLoader);thumbHolder_mc.addChild(imageLoader);addChildAt(thumbHolder_mc, 0);addChild(imageText);