today My google tools show my sitemap have mistake,please see below:

"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."

do you have a good sitemap builder?

Well, wherever you got the sitemap from isjust not proper...

a good one to use is www.xml-sitemaps.com. This is the sitemap builder that is recommended by Google and they will build your sitemap for free in html, xml, ror, or just a text file.

also you usually have to set the priority after the sitemap is built because it will apply a generic priority to every link. Priority is a scale from 0.1 - 1.0 where 0.1 is your unimportant pages and 1.0 is most important. so go through and apply numbers as you see fit for each of your pages in the sitmap. things like contact us or quote form would be of lower importance usually and things like your home page or main service pages would be higher. Hope this helps

Personally, I never use the priority; it's just an optional feature in the XML standard that probably isn't really used by search engines too much. My sites and my client's sites rank properly and get indexing just the same without it.

I feel a good sitemap generating tool will do the job and I keep the priority to the default level (0.5) and only change the frequency of update. Apart from the more popular and free www.xml-sitemaps.com
the other tools worth a try are http://www.vigos.com/products/gsitemap/
www.freesitemapgenerator.com
www.writemaps.com
http://gsitecrawler.com/
http://www.auditmypc.com/free-sitemap-generator.asp
http://www.rorweb.com
Enjoy