Since updating WP I have lost my sitemap PLUGIN

Due to incompatibility with a plugin I was using for my sitemap, I had to delete it and install another one. I have chosen the google xml plugin and this seems to be working including submission to google and search engines, but I want it to output on my sitemap page, which is currently blank.

I presume this is obvious to someone, but I am a bit stumped. Any further assistance on this matter would be very warmly received.