I was having exactly the same problem last week and it turned out that I was not apparently logged in properly, so what you need to do is go to log in put in your user name (which I assume is Happy Camper) and then your password.
Also, you get to see if you are logged in or not as it will tell you who is active on the forum at the top of the page and if you are 'cruising' the forum and your name does not show, then you are not logged in correctly.
Once logged in properly, the system remembers you each time in the future so you should not have a problem.
Also, quic k tip, look at the bottom of the chat forum and if it says you 'cannot' post etc, again, you are not logged in properly.
Hope this helps,