I need help rewriting "if" statement

The following coding works fine when the Child is present on the stage.
However there are times when the Child is not on the stage. Under those circumstances when then function is called I get this error.

[COLOR=red]ArgumentError: Error #2025: The supplied DisplayObject must be a child of the caller.[/COLOR]
[COLOR=red]at flash.display::DisplayObjectContainer/removeChild()[/COLOR]
[COLOR=#ff0000][/COLOR]
[COLOR=seagreen]function gonextyear(e:MouseEvent):void{[/COLOR]
[COLOR=seagreen]if(videoAvailable == true) {[/COLOR]
[COLOR=seagreen]removeChild(videoHolder);[/COLOR]
[COLOR=seagreen]SoundMixer.stopAll();[/COLOR]
[COLOR=seagreen]}//if{}[/COLOR]

THanks so much
-k:tie: