I am using Sitemap Generator successfully in another situation, but when installing on another site I get a "500 Internal Server Error The server encountered an internal error or misconfiguration and was unable to complete your request". The permissions of the directory and files are set as indicated. I am able to reach the documentation.html file, but get the error when trying to access the generator.
The site it is not working on is [external links are visible to admins only] The site is working on [external links are visible to admins only]
The other installation is working on the same server on another site that I own.
Thanks for the help.