SMF For Free Support Forum

Forum Url: http://www.expatjam.com.smfforfree.com
i am sure this has been asked before, but... a lot of our new members can register, log on and view, but when they go to reply they are logged off of the site. we have recommended lowering the security settings and is has worked for a few members but others are still having issues. can someone recommend an easy fix?? cheers and tia