Flas work fine in IE and not on FF

Hola. well, i create a banner with xml data that work fine in IE and no work in FF.
when load the image for the first time, on FF, it tween that image for the wrong _x and _y location and not show the preloader… when load the image for the second time work fine …
but i u try see this in IE show the preloader and when load tween the image for the right local…
anyone know some about this ? help please…

the link is: http://www.midiazero.com/projects/bannerXML:2/
link for fla: http://www.midiazero.com/projects/bannerXML:2/main.fla
link for xml: http://www.midiazero.com/projects/bannerXML:2/dados.xml

tks in advance…