I followed the instructions, chmod 777 on sitemap* and patched the db but I get this:

[SCR]SiteMapXML (v 2.1.0 30.04.2009 10:35)
Categories Sitemap
Failed to open file "sitemapcategories.xml"!!!
File http://localhost/sitemapcategories.xml. Written 0 items (0 bytes), Filesize: 0 bytes
Ezpages Sitemap
Failed to open file "sitemapezpages.xml"!!!
File http://localhost/sitemapezpages.xml. Written 0 items (0 bytes), Filesize: 0 bytes
Products Sitemap
Failed to open file "sitemapproducts.xml"!!!
File http://localhost/sitemapproducts.xml. Written 0 items (0 bytes), Filesize: 0 bytes
Reviews Sitemap
Failed to open file "sitemapreviews.xml"!!!
File http://localhost/sitemapreviews.xml. Written 0 items (0 bytes), Filesize: 0 bytes
Sitemap Index
Include sitemapproducts.xml (http://localhost/sitemapproducts.xml)
Include sitemapcategories.xml (http://localhost/sitemapcategories.xml)
Failed to open file "sitemapindex.xml"!!!
Total Execution Time 0:0.0143[/SCR]

Anyone has any idea how to fix it?

Cheers