Technorati Issues

I cannot "ping" my blog on Technorati anymore, can someone please tell me what I should do? Previously whenever I ping my blog, it will show that I have pinged by blog successfully. However, for the past 2 weeks, everytime after i click on "Ping" on the "Manage my blog" section, it would still show "Last Ping: 13 days ago".

I have sent an issue report to Technorati, but have yet to get a reply from them.

Someone pls give me advise.