Google gave me this info, does anybody know how to fix this?

All the URLs in your Sitemap have the same priority.
All the URLs in your Sitemap are set to the same priority (not the default priority). Priority indicates the importance of a particular URL relative to other URLs on your site, and doesn't impact your site's performance in search results. If all URLs have the same priority, Google can't tell which are more important

Thanks,

I had a feeling that Tom is going to give me some insights because he's an expert in this industry.

This helps a lot Tom. Thanks a bunch!

Yea, I notice it gave me an xml file that I can go in there and change the priority manually. One thing about it that I don't know if I should use this new sitemap.

Since dotnetnuke only gives me a few pages on my site, but Google actually sees a whole lot more, does it make sense to resubmit the sitemap to Google?

You can see the results below:

DotNetNuke sitemap: http://www.cuongdang.net/SiteMap.aspx --- It shows I only have 6 pages

Google sees this: http://www.google.com/search?hl=en&q=site%3Awww.cuongdang.net&btnG=Search --- don't know what's the deal is.

Thanks!