If you have a corrupt xml sitemap try regenerating it manually to see if that fixes the problem, or you may have to build your sitemap manually or use a wordpress plugin to generate your xml sitemap.
There is a great plug-in for wordpress called "Google (XML) Sitemaps Generator for WordPress" this plug-in once downloaded and installed allows you to configure a sitemap for your blog. If you aren't using a sitemap for your blog, you definately should be. First off let me explain what a Sitemap is. Introduction: What is a [...]