Drag and drop target stuck to mouse - help!- see swf

Hi, i´ve been going through some tutorials and samples of “drag and drop” flash movies and I always come apon the same bug. The [COLOR=red]drop target[/COLOR] gets [COLOR=red]“stuck”[/COLOR] to the mouse, and when I click the target it just drops down and doesn´t return to its orig. position. This mostly happens when the target in the [COLOR=red]“lower order”[/COLOR] is [COLOR=red]droped behind[/COLOR] a target that is [COLOR=red]“in front of it”[/COLOR] Now I have used the

 this.swapDepths(_root.getNextHighestDepth());

to fix the [COLOR=red]“order”[/COLOR] problem but still the problem some times happens. - You can see the problem in the fla/swf if you drag on of the “lower order targets” under the “front targets”.

Does any one know if there is a way to fix this…?