What is that white screen !?

why is there a white screen before my flash starts ?
please help !!!

my site im talking about :
www.commit.com.sg/main.htm

mal

It seems that your preloader isn’t kicking in fast enough so that’s why you see that white screen.

i am using this :

total_bytes = _root.getBytesTotal();
loaded_bytes = _root.getBytesLoaded();
remaining_bytes = total_bytes-loaded_bytes;
percent_done = int((loaded_bytes/total_bytes)*100);
bar.gotoAndStop(percent_done);
ifFrameLoaded (“startup”, 150) {
gotoAndPlay(“startup”, 1);
}

as my preloader, is it not fast enough ? is there anything i can do about it ?