Why default panel in Spry Accordeon doesnt work ?

Question

The solution do the default panel when a new page is loaded seems to be:
<script type="text/javascript">
var acc1 = new Spry.Widget.Accordion("Acc1", { defaultPanel: x });
</script>
(x=number of the panel minus 1)
This is written in many tutorials.
But i've tried and only works with default panel 0. When i try with
number 2 for instance, the head/tab is marked but doesnt expand.
Anyone knows what's wrong ?

Answer 1

I don't see any defaultPanel options in your constructor..
<script type="text/javascript">
<!--
var Accordion1 = new Spry.Widget.Accordion("Accordion1");
//-->
</script>
Should be:
<script type="text/javascript">
<!--
var Accordion1 = new Spry.Widget.Accordion("Accordion1", {defaultPanel:2});
//-->
</script>
Keep in mind that default panels are zero based, so panel 1 is actually panel 0.