Hello, My site URL is http://bit.ly/161NeE and our site was ranked first page for over hundred keywords before March, 30. But all of a sudden, all the keywords on first page dropped to 5th or 6th page. When we search for our site name without ".com", the results appeared on first page are all from other sites. And our page can only be seen on 6th page. We think we have been penalized by Google. But we don't know the exact reason. Can anyone please help? Some extra info on our site: 1. We have been building links by posting blog, articles and PR. All the articles are unique, written by the writers we hire. It has been working fine all the time. We also varied the anchor text a lot. 2. We didn't make any change to the website. But one real problem with our site is that the server is very slow recently and when google crawl our website, many errors were found, mostly 503, 404 errors. And the total number of errors have reach to over 50,000. Do you think this might be a problem for Google not displaying us on first page? Our technicals are working hard to solve server problem. And if it is solved, shall our rankings be back? Please advise. Thanks.