Ok guys i have a flash movie and all is working great in IE but when i pop it into FFox my preloaders dont work please see below the code im using in 4 diferent sections

Code:
bytes_loaded = Math.round(_root.subNav.pannel.inSection.one.thumb1.getBytesLoaded());
bytes_total = Math.round(_root.subNav.pannel.inSection.one.thumb1.getBytesTotal());
getPercent = bytes_loaded/bytes_total;
loadTextThum = Math.round(getPercent*100)+"%";
if (bytes_loaded == bytes_total) {
	gotoAndPlay("images");
}