Flash ComboBox closes unexpectedly with FP 9 & 10

/*
* Modify the ScrollThumb SimpleButton class so that combobox doesn’t close
* when scroll controls are used if it’s contained in a swf which is
* loaded within a container swf (bug within flash V2 combobox component)
*/
 
mx.controls.scrollClasses.ScrollThumb.prototype.onRelease = function(Void):Void {
//this._parent.releaseFocus();
this.stopDragThumb();
this.super.onRelease();
}
 
mx.controls.scrollClasses.ScrollThumb.prototype.onReleaseOutside = function(Void):Void {
//this._parent.releaseFocus();
this.stopDragThumb();
this.super.onReleaseOutside();
}
 
mx.controls.SimpleButton.prototype.onRelease = function(Void):Void {
//this.releaseFocus();
this.phase = 'rollover';
if (this.interval != undefined) {
clearInterval(this.interval);
delete this.interval;
}
 
if (this.getToggle()) {
this.setState(!getState());
} else {
this.refresh();
}
this.dispatchEvent({type:'click'});
}
 
mx.controls.SimpleButton.prototype.onReleaseOutside = function(Void):Void {
//this.releaseFocus();
this.phase='up';
if (this.interval != undefined) {
clearInterval(this.interval);
delete this.interval;
}
}