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thanks again for the help Andy,

I would happy to provide you what kind of details do you need?....

thanks

thanks for the reply, the articles are original with good content

basically have been booted out of serps's altogether,

Regarding links, We bought articles in other related sites. In gambling sites is very common to do that, you can see the biggest top ranking sites doing that..

I checked the backlinks of casino.pt and they look fine...

what do you suggest us to do?

thanks for the help

the site is casino.pt

we created the site 7-8 month ago, we started to push it by good and natural links (http://www.opensiteexplorer.org/www.casino.pt/a!links!!filter!all!!source!external!!target!page), links in sites with content rich and most of them related to gambling and sport topics.

During the first 3-5 months, the rankings were better and better, after the 6 months, the site lose all its rankings.

Aditional details

1. http://www.casino.pt/robots.txt
2. http://www.google.pt/#hl=pt-PT&source=hp&biw=1280&bih=805&q=site:http%3A%2F%2Fwww.casino.pt&aq=f&aqi=&aql=&oq=&fp=2651649a33cd228
3. no critical errors in google webmaster tools

any idea how can I fix it?

thanks