I've just purchased Standalone Sitemap Generator v. 3.0, and installed it on a site with more than 500 files. Installation, configuring and crawling all went smoothly. (It's a Windows 2000 server, but the host turned on PHP and it seems to work fine.)
The HTML sitemap has 693 files. It's fine. So is the text file. But the XML and ROR sitemaps are all empty. The file is there, but it shows nothing, and when I look at the source code, they are indeed totally empty.
What's the fix?