Removing Movieclips from an Array Displayed on stage

Hi Everyone ,

I am new to AS3 so please forgive me in advance if I end up annoying anyone ;(

I need some help in removing Movie Clips from the stage , these were initially loaded off an array

Here is the Code with the NEXT Button , : for both ARRAYS , Notes and Notes15 ( referring to 15th frame)

function nextframepop2(Event:MouseEvent):void{

trace("Mouse Enabled");

removeChild(notes15[4]);

removeChild(notes15[3]);

removeChild(notes15[2]);

removeChild(notes15[1]);

removeChild(notes15[0]);

nextFrame();

function nextframepop1(Event:MouseEvent):void{

trace("Mouse Enabled");

removeChild(notes[1]); // This is Line 635 , but I am not sure what I am doing wrong here.

removeChild(notes[0]);

nextFrame();

}

I am calling this Function with an If Statement , I need to make sure all the Movie Clips are loaded before the End User decides to move to next slide.

Here is what I get when I run the Next Button ,

ArgumentError: Error #2025: The supplied DisplayObject must be a child of the caller.

at flash.display::DisplayObjectContainer/removeChild()

at PORTDemoPresent_fla::MainTimeline/nextframepop1()[PORTDemoPresent_fla.MainTimeline::frame 2:635]

Can anyone please help ?