Hello Mate, May be u have used some spam content for your website promotion. so google decrease the page rank. Use directory submission method for ur website promotion. Social Bookmarking also use for promotion. Thnx.
You also need a lot of time and a lot of luck. You might not see any change for a year or more, and some sites never do see an update (I've got a couple of those...)
I think you should try to get more social bookmarking submission for backlinks. Try out the addthis.com widget, it has lot of important social networking sites in the list which can yield traffic as well as backlinks for your site. Also try to do some forum posting and high rated authority blog commenting which can get you some high pagerank backlinks for your site