WPMU DEV SEO Sitemap Configuration

Just installing wpmu dev seo for multi site/buddypress -- 3.1 wordpress + 1.2.8 buddypress (using multidb).

I notice when configuring on step 2, Path to XML Sitemap is listing the wrong path, because the listed path isn't existed. It's pointing to wp-content/blogs.dir/1/files/sitemap.xml which I don't have a directory starting with 1.

URL to sitemap is also not existed, but it lists as http://blogmyway.com/sitemap.xml. When click on it, it says the sitemap was not found!

It's not working for me!