Hai all. After penguin2.1 update my website rank has been totally dropped in SERP. After few months i have started giving back links on quality sites like articles with page rank 5 and above. But still i can't able to see any of the links pointing to my site from other site in google webmasters. What is the problem and how can i recover my site and get back links from quality sites. Is this because of back linking problem or any penguin updates. I need a clear answer for my issue. Can anyone rectify my problem soon.