Sitemap for multisite

Hi,
I have installed Simple Sitemaps For Multisite for generating sitemap for multisite but its not working fine, as it is generating sitemap with sub domain url if a url is already mapped and also generating site in previous dates.
For example : site under multisite : pune.chennaiservicedapartments.com is mapped to http://servicedapartmentspune.com/ but while generating dynamic site map it is using sub domain and need to change it manually.
Please look into this and get it resolved asap.