Can't click on Subclass display object, help?

programming flash
1

I got this as a subclass, basically it’s a movieclip on top and a loader on the bottom.


        public function WorkThumb(namer:String, desc:String, url:String, thumb:String, num:uint) {
            addChild(loader_mc)
            addChild(workDis);
            urlTxt = url;
            desTxt = desc;
            nameTxt = namer;
            thumbTxt = thumb;
            numTxt = num;
        }

on the main class i used to load WorkThumb, basically i got functions like these:

_workThumb.mouseChildren = true;
                                _workThumb.buttonMode = true;
                                _workThumb.addEventListener(MouseEvent.ROLL_OVER, workDisRollOver);
                                _workThumb.addEventListener(MouseEvent.CLICK, workDisClick);

This should be working properly and it does, but there seem to be a slight problem.

i can’t rollover or click at the _workThumb properly, it’s the kind of thing where it sometimes work, sometimes doesn’t. Do you guys have any suggestions? Would it be because there is a loader class in the sub class?

thanks