Answer
STAFF
Sam Wierema
04-Apr-2012 13:29:10
Our records indicate that you cancelled your Premium Twitter Stats subscription on 12 March. Your subscription was subsequently de-activated on 22 March, which would explain why you're not seeing updates for your @mentions and re-tweets anymore.
If you wish to re-subscribe as a Premium user you can do so via our signup page at http://twittercounter.com/pages/premium.