you might check and see if your browser is allowing the site to set a cookie when you log in. The ONLY thing these cookies do is ensure that it's YOU that is doing the posting. We don't track anyone's anything, but without cookies it would be possible for a hacker to hijack your session and do who knows what. So that's the first place I'd look. You might try a different browser than your usual.
Here's the URL to some of the more common ones, all much better than Mickey$oft's "Internet Explorer" (TM)
Firefox
Opera
Chrome
Safari