Istallation of "utimo" theme and can't see products

I’ve installed “ultimo” theme on Magento 1.5.
The theme work properly but i can’t see the product inside the categories.
What can be happen?
With other theme the site work properly.
Thank you in advance

Can’t see the products or cant see the product images?

It does say “Sample images in the live preview are for demo purposes only and are not included with the theme.”

I can’t see all produts. I can see all the category. If i open a category i can see the number of product. But i cannot see products. I’have this problem just with “ultimo” theme.

Best bet is to ask the author