COLUMN BACKGROUND IMAGES

Hello, I am trying to change the background of a strip using an element from my database. The dataset is called, “portfolioDataset,” the strip is called “screenshotStrip” and the database element is called “screenshot.”

I have put the following code into my page, but I continue to get the error, “background is undefined” and the background of the strip does not change.

Can you help me understand why this isn’t working, and how to fix it?

$w.onReady(function () {
$w(“#portfolioDataset”).onReady(function(){
$w(‘#screenshotStrip’).background.src = $w(‘#portfolioDataset’).getCurrentItem().screenshot;
});
});