[Plugin: WordPress SEO by Yoast] page-sitemap.xml displaying Home instead of sitemap

Hi,

I use WP 3.3.1, atahualpa and wordpress SEO.

page-sitemap.xml is not working : it leads to home page instead of page sitemap.
Other sitemaps work properly (post and post_tag) …

Any clue on what is happening ?

Thanks !

http://wordpress.org/extend/plugins/wordpress-seo/