Rails spinoffs - Oct 2005 - droping element and effect "of comming from nowhere"

Hello everyone. 
I''m using drag and drop on my site, I''v notice strange effect
about droping. When I hold element over the droppable area, and drop on it, i
see that element not exacly drop on the droppable area, I see something like
element coming from outside of the screen, or coming from diffrent position,
it''s look like element slide and then is dropped on the droppable area.
I haven''t seen anything like this in demo on
http://wiki.script.aculo.us/scriptaculous/show/Demos but i wrote my site looking
on tutorial and i don''t what i''m doing wrong. Is it my fault
or i don''t know maybe error in library. I''m using prototype
1.4.0 and scriptacuolo 1.5.rc.3
Here is sample of my code:
new Draggable(''element'', {
     handle: ''subelemnt'',
     revert:true
     });

Droppables.add("droparea", {
                            onDrop: function(element)
                                                       {
                                                             //here si the code
                                                                TargetParent =
Target.parentNode;
                                                               ElementParent =
element.parentNode
                                                              
ElementParent.appendChild(Target);
                                                              
TargetParent.appendChild(element);
                                                                },
                                                               
hoverclass:''aktywna-t''
                                                                }
                                                       );

Thanks for any help
Gregor

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