Not sure what you've done Teepee

When you go to whichever forum you are talking of, you have to click on whatever topic you want to reply to and open it up, then you'll find a reply button - one at the top and one at the bottom of the screen; on mine it's green with reply in white.
I think only the For Sale & Wanted ones don't have a reply button, but there may be others.
The 'ordinary' subjects are OK.
Dawn M