Forum:Blog comments - why can't I make them?

For some reason, I can't seem to post any new comments on blogs. I can type them out, but it just comes up with "by" when I click "Post Comment" and that's it. What's going on? Was I blocked from commenting as part of a shared IP or something? Please, you've gotta help me!!!!!!!! Sgt. S.S. 20:25, December 20, 2011 (UTC)