The corners are not curvy for me in FF IE7 or Safari. No Change

I installed the .js files from 1.2.10 but Drupal didn't recognize them so I installed the .js files from 1.2.9-beta and then Drupal did recognize them. I then copied this:

window.onload = function()
{
settings = {
tl: { radius: 10 },
tr: { radius: 10 },
bl: { radius: 10 },
br: { radius: 10 },
antiAlias: true,
autoPad: true,
validTags: ["div"]
}

var divObj = document.getElementById("myDiv");
var cornersObj = new curvyCorners(settings, divObj);

cornersObj.applyCornersToAll();
}

from the read me file directly into admin.settings.curvyCorners code box and selected "Lite" and "Full" but nothing on my site changed in any browser.

Am I missing a step somewhere?