Look no further then your signature for an answer to your question, why you got banned. Actually someone, who is into hacking should be able to read and understand documents precisely.
Hello Sudil Shrestha, While going through our records recently, we found that your AdSense account has posed a significant risk to our AdWords advertisers. Since keeping your account in our publisher network may financially damage our advertisers in the future, we've decided to disable your account. Please understand that we consider this a necessary step to protect the interests of both our advertisers and our other AdSense publishers. We realize the inconvenience this may cause you, and we thank you in advance for your understanding and cooperation. If you have any questions about your account or the actions we've taken, please do not reply to this email. You can find more information by visiting https://www.google.com/adsense/support/bin/answer.py?answer=57153&hl=en_US. Sincerely, The Google AdSense Team Code (markup):