Adsense Expert Needed

I have a site that ranks high on [login to view URL] by the keyword "Yahoo Maps". And it has a traffic of 500 unique visitors daily. I put the Google adsense code on it but my account is disabled by Google. I don't think I have ever done anything inappropriate that violates Google rules. Here are the inscription I received from Google. "After reviewing our records, we've determined that your AdSense account poses a risk of generating invalid activity. Because we have a responsibility to protect our AdWords advertisers from inflated costs due to invalid activity, we've found it necessary to disable your AdSense account. Your outstanding balance and Google's share of the revenue will both be fully refunded back to the affected advertisers. Please understand that we need to take such steps to maintain the effectiveness of Google's advertising system, particularly the advertiser-publisher relationship. We understand the inconvenience that this may cause you, and we thank you in advance for your understanding and cooperation." I need and adsense expert to find out which specific rule my site violates and guide me to the right way. During the whole work process, you are allowed to do any change to my site to fit Google Adsense rule. The payment to the bidder will be released ONLY when I receive the first payment from Google Adsense.