I just received an email from a forum member who is having an issue. The error: you log in, wait to be redirected to the forum index, and you arrive LOGGED OUT. I ran into this same issue after we updated but rest assured, it's easily fixed.
1 word, COOKIES. It’s an old cookie on your browser that was for the old forum, that once cleared, will clear up this issue.
If you are using Internet Explorer, go to Internet Options -> General (tab)-> under “browsing history”, click “Delete”. Then it will ask you what you want to delete. Uncheck them all except for “cookies” and “preserve favorites”. Hit “delete” and refresh and try the forum login again.
If using Firefox (recommended), click Tools -> Options -> Privacy (tab) -> remove individual cookies -> search for “sscycle.com” -> then look for cookie names that start with “phpbb3” and remove them. Refresh the forum and login.
*Firefox for Mac: On the top menu, pick Firefox -> Preferences -> Privacy (tab) and the rest is the same.
If using Chrome (recommended), click on the wrench -> Settings -> type “cookies” in the Search Settings box -> Content settings -> All cookies and site data -> search for “sscycle.com” in the cookie search -> then look for cookie names that start with “phpbb3” and remove them. Refresh the forum and login.
Or you can clear your entire private data from either Firefox or Chrome and start fresh. Just be mindful of what else you may be clearing such as stored passwords or form data.
I hope this helps. Have a great one!