generate quality backlinks.

keep gathering quality backlinks

it is not about number of backlinks it is all about quality of backlinks

you can focus on high PR site. post your link on high pr site.

Try and fins some back links with a good reputation.

Well..don't worry sometimes it happens... Could you please let me know what strategies you implemented on your websites so far? This would allow to figure out what exactly happened..

Google has recently improved its cataloging function to ignore artificial backlinks. So the more backlinks you have, the lower your rating.

This was widely reported in the Western press.

You will have to find another cheat.

Ranking on google required relevant backlinks. If your website backlinks are relevant to your keywords then surly position will improve. But if your backlinks are not relevant to your keywords and website core business then it will difficult to improve ranking on search engine. So backlinks numbers don't counts but relevant backlinks matters the most in improving the ranking on Google.....