Flash Preloader Problem....please help

I have created a website ( http://www.gapproject.co.uk) with a preloader.

When you access the ( http://www.gapproject.co.uk/gap_gallery.html) page of the site (which is over 2meg) the content loads about 90% and THEN shows the preloader.

I want the preloader to start showing from 0% through to 100% before directing me to the first frame of the website??

Any ideas as this leaves people waiting with a blank screen for a while before seeing the progress bar load from 90% ish to 100%???

my AS code.....

myProgressBarListener = new Object();

myProgressBarListener = function (eventObject) {
myProgressBar._visible = false;

gotoAndStop(8);
};


myProgressBar.addEventListener("complete", myProgressBarListener);

myProgressBar.mode = "polled";

myProgressBar.source = "_root";

myProgressBar.conversion = "1";

myProgressBar.label = "LOADING %3%%";

myProgressBar.direction = "right";

myProgressBar.labelPlacement = "bottom";

stop();