Mc loader and swfs loading and posotion unsolvable problem

Here is the thing : on rollover on thumbnails ( buttons)its preview has to appear on the top of it.My corrected code works fine exepted that my swf don’t load in a good way…they load at 60 kms from the thumbnail…and in a distorted size???
I don’t get it.
I turn the thing in all ways but it is getting worth…
What is my mistake?
Code for each button ( thumb)
on (rollOver) {
_root.caption._visible = 1;
on (rollOut) {
_root.caption._visible = 0;
Do you have an idea ?