Keywords Down After Latest Panda Updating 27 September 2012 | How to Recover Keywords Position?

Hello Friends hope you fine after latest panda updating 27 September 2012. This week after panda update my sites keywords have been very down (which is very shocking for me). Before latest panda updating my sites keywords are on the first page of Google search results but after latest updating all keywords are down even not showing in 200 positions.
Can anybody tell me what the reason and how long it takes that my keyword on same ranking? I have removed all the duplicate content, made new unique posts, continued back linking but keywords are still down and also explain me what is over optimization!
We are building 90% approved 170 to 200 links. Is it considered over optimization? If it is, so what should I do and what are your recommendations for panda solution and daily link building activities.

 

sir, yes keyword density plays a role in page rank and search rank but i don't know why you give it that much importance.
imagne this top 1 million sites are using keywords density so whom google will choose to bring him the 1st, read more about page rank and website rankings and u will get ur answers, don't ask here because most of them don't know they will only tell you blog commenting and bla bla bla.

 

You should not focus on Link building as a big deal. But get back links only from the sites f good reputation and high PR along with relevant niche.

 

get back links only from the sites f good reputation and high PR along with relevant niche

 

Link building is also an important activity but I also think online reputation management is also important.