Did you change anything? Is your site still showing up?
Rule out a Google penalization by anwsering the following questions:
- Is your site still indexed?
- Does your site ranks for your domain name or branded words?
- Does your site ranks for unique terms from your title tags?
- If you have answer "NO" to any of these questions, you probably have been penalized.
- Otherwise, you don't have a penalty and you need to get high quality links. Also, review your on-page SEO.
Duplicate Content URL # 2
Duplicate Content URL # 1