Bing Saying My Site Map Is Coming Up Empty

I have given the URL of my site map to Bing several times and they report that the site keeps coming up empty.

can anyone tell me what the problem could be?

Hi

Have you tried looking at the sitemap yourself?

Barry

I have used the URL for the site map. The site map comes up. There is also a message with it

-This XML file does not appear to have any style information associated with it. The document tree is shown below.

I don't know anything technical- is that the problem or is that normal?

Thanks