Lately, I've been having issues trying to link my typepad account to twitter. I added my twitter account to typepad some time ago, and whenever I would try and link the accounts, typepad would either error our, saying they were addressing the issue, or no error at all (updates still not working).
My quick fix was to delete my twitter info on typepad and then create a new one. If you are having the same problems, I would try that first.