Twitter mass is already disabled from twitter, it just started about a week or two ago. Try logging on twitter mass if you have it, and see what happens!

"To put it bluntly, TwitterMass is a hyper networking tool for Twitter. It's been called the "Twitter's Swiss Army Knife" and the "Twitter Networking Tool on Cruise Control". Our system aims to eliminate some of the mundane processes of growing your Twitter network by giving you a suite of tools to build meaningful relationships. In the end TwitterMass is a system that fully automates your Twitter outreach and exponentially grows your niche Twitter network."