Site not letting me post replies on classified ads?

Hi, I have been a member for about 2 years now, I am not too active on the site, mainly just browsing classifieds and every now and then posting something. And today I wanted to respond to a classified ad and it came up with the error message saying that I was not allowed to post a reply, or that my account has not been activated, blah, blah, I'm sure you know what I am talking about.

I was just wondering how to fix this? My account is definitely activated, so unless an administrator has blocked me for some reason (I wouldnt know why, I have never done anything wrong on this site) I don't know what is happening.

Please help

There are announcements at the top of every category of classifieds which explain this, as well as multiple threads in this forum. The short version: registered members are no longer allowed to post replies in the classifieds.