I’m getting the same problem as FantasyCrusader and others….
I upload the plugin, activate i and immediately get a server 500 error. I can’t go into the plugins page to sort anything out. Delete the plugin via FTP and plugins page works again.
I disabled all other plugins and it worked. renebaleed them one by one and got conflicts with the following plugins….
1. Related posts (https://www.rene-ade.de/inhalte/wordpress-plugin-relatedposts.html)
2. Samsarin
3. WordPress.com stats 1.1.1
Removing those made sitemap run OK.
I’m on WP 2.3.2 and Google sitemaps 3.0.3