I am using 1.3.9h on 2 zencart stores. I had no issues running Sitemap XML. I do not remember having to make any code changes. I did, however, change the Ping URL's to this, which was provided in this thread and everything worked perfectly. Thanks

Google => http://www.google.com/webmasters/sit...ng?sitemap=%s; Yahoo! => http://search.yahooapis.com/SiteExpl...ooDemo&url=%s; Ask.com => http://submissions.ask.com/ping?sitemap=%s; Bing.com => http://www.bing.com/webmaster/ping.aspx?sitemap=%s