Sitemap integration is not working with global translator when wordpress is not at the site root:
Like for instance http://www.mysite.com/blog/sitemap.xml is the location for the blog's sitemap.xml, the plugin still looks for http://www.mysite.com/sitemap.xml. This is actually a valid behavior but can be improved for installations like joomla: http://www.mysite.com and wordpress: http://www.mysite.com/blog so there are actually two sets of different sitemaps and global translator should be looking the the wordpress root not the document root. This should be a line of code change but i didn't have the time but if the developers won't fix it, i'll issue a patch.