Draggable windows gone crazy

hey guys,

i just made a draggable window for my website, its contained within a movie clip

(profile_mc) and with in that there is a button which has these actions applied to it :

on (press) {
startDrag(_root.profile);
}

on (release) {
stopDarg();
}

now it all works good, but its reall jerky and just stops even if you dont release. its a bit strange and i dunno why its doin it.

any suggestions, if some one could take a look at my fla file and see if they know whats up with it or a better way to do it that would be awesome.

http://www.shapebydesign.com/shape.fla

thanks in advance.

simon