How to include subdomains in sitemap

[gediweb]

Please help. My site has a number of subdomains that I want to include in the sitemap. There are links to it in the main site, so it's crawling them and showing me the ext links, but it's not adding them into the sitemap.

I have 6.1 and supposedly, this is possible. Please let me know.

Thanks

[gediweb]

never mind. I found the option to check off for the subdomains