submit your sitemap to google webmastertools, my help you get index by google.
every time you update your site map, ping google with the URL below
Code:
www.google.com/webmasters/tools/ping?sitemap=sitemap_url
example
Code:
www.google.com/webmasters/tools/ping?sitemap=http://www.example.com/sitemap.gz
this ping is to let google know that you already update your sitemap, and ask google come to crawl