Drag and Drop problem

1

I’m working on a page where you drag and drop different slides into a projector, in order to make it display an image. This works properley for the first slide (no matter which one you chose), however, nothing happens when you try subsequent slides.
When you drag and drop the slide, it goes to the corresponding frame, which has the correct image displayed. The idea is that you can then put any other slide in the projector, and it move to another frame, thus displaying the correct image. If the slide is not placed on the projector it is returned to its origonal position. However, it only works for the first slide.
Has anyone else had this problem and knows what to do?

This is the code for each of the slides (the frame number obviously changes for each slide)

on (press) {
    startDrag(this);
}
on (release, releaseOutside) {
    stopDrag();
    if (this._droptarget == "/terrapinmc"){
        _root.gotoAndStop(2);
    }
        else{
            this._x = 0.2;
            this._y = 217.8;
        }
    }

Thanks for your help