jQuery slideshow - first image not showing

the first image is not showing. here's a live link: www.amazinggirl.com.au

here's the html:

<div id="slideshowBox">
 <img src="img/01_big.gif" id="photo" />
 <!--span id="slideNumber"></span-->
</div>


here's the jQuery:

<!--  SlideShow  -->
<script type="text/javascript">
    var ImageArr1 = new Array("img/01_big.gif","img/02_big.gif","img/03_big.gif","img/04_big.gif");
var ImageHolder1 = document.getElementById("photo");

function RotateImages(whichHolder,Start)
{
var a = eval("ImageArr"+whichHolder);
var b = eval("ImageHolder"+whichHolder);
if(Start>=a.length)
Start=0;
b.src = a[Start];
//document.getElementById('slideNumber').textContent = "Slide "+(Start+1)+" of "+ImageArr1.length;
window.setTimeout("RotateImages("+whichHolder+","+(Start+1)+")",5000);
}

RotateImages(1,0);
</script>