Are you saying that no pages are indexed, or just that not all of them are indexed?
If only some of your pages appear, it’s possible Google just hasn’t crawled the entire site yet. Also, Google does not guarantee to crawl and index all pages.
If none of your pages is indexed, then it would suggest that your site has been penalised in some way, or that your content is regarded as very poor quality. Is your content all original and well-written? Are you sure that you’ve followed Google’s Webmaster guidelines?