[Plugin: Google XML Sitemaps] Wrong URL path

Google is reporting the following error on the sitemap submission.

Paths don’t match
We’ve detected that you submitted your Sitemap using a URL path that includes the www prefix (for instance, http://www.example.com/sitemap.xml). However, the URLs listed inside your Sitemap don’t use the www prefix (for instance, http://example.com/myfile.htm).

The path is correct as listed below. I have manually added external links and included www as prefix. Any suggestion on getting this resolved.

<url>
<loc>http://threemealsaday.com/index.php/2010/03/15/cinnamon-breakfast-puffs/</loc&gt;
<lastmod>2010-03-16T00:42:38+00:00</lastmod>
<changefreq>daily</changefreq>
<priority>0.6</priority>
</url>
Manual

<url>
<loc>http://www.threemealsaday.com/Casseroles.aspx</loc&gt;
<changefreq>weekly</changefreq>
<priority>0.6</priority>
</url>