I dont know why on firefox the div dont load the css stuff (the border and padding)

the java
-----------------------------------
script type="text/javascript">
swfobject.embedSWF("movie.swf", "banner", "520", "247", "9.0.0", "expressInstall.swf");
</script>

the div
-----------------------------------
<div id="banner">
<p>you need flash ....</p>
</div>

the css
-----------------------------------
#banner {
width: 520px;
height: 247px;
padding: 4px;
border:1px dotted #bfbfbf;
}

RESULT:
works in Safari... DONT WORK IN Firefox.

thanks! any help