Dear All, I have a website having domain age of 4 months. When I started SEO for certain keywords it began to show results with improved ranking. In the meanwhile we redesigned the website and changed the URLs of few pages. Now ranking is dropped and my website is nowhere for those certain keywords and its showing lots of "Not Found Error" in Google Webmasters Tools. Can anyone suggest how to overcome from this and could regain the previous ranking again. Thanks in advance.