What Strav is saying Donna is that you can reply to posts rather than start a new thread. You just hit the reply button on the post (or the reply button with quotes if you want to quote the previous posters message first).
There is no restriction on either posting new threads or replying to existing ones.
The ONLY restriction is private messages and that is because there has been some spam. It's actually better to put things on the forum rather than PM's since everyone can share the info and we know that there are people that read the forums without signing up
I hope that makes it clearer.
P.S I was wondering initially why Tiffani needed help