I found that my yahoo search traffic is down 50%, I also found that they last processed my sitemaps on October 2006, Please help so that I can increase search traffic. I was looking at Yahoo Site Explorer..

Also please suggest, if is there could exist some problem with my sitemaps , due to which Site's traffic is low? Is there need for some modification in the sitemaps or what are the ideal conditions to be added in the sitemaps...