Load bar problem

[Freezburn]

Here is the code I'm using.

bytes_loaded = Math.round(this.getBytesLoaded());
bytes_total = Math.round(this.getBytesTotal());
getPercent = bytes_loaded/bytes_total;
this.loadBar._height = getPercent*100;
this.loadText = Math.round(getPercent*100)+"%";
if (bytes_loaded == bytes_total) {
this.gotoAndPlay(3);

The problem is that the progress bar will make it about 1/4 of the way up before the movie is all the way loaded. The percentage text is acurate though.