I have a SMF forum brigded to Joomla using JSMF. The problem is that when anyone registers on the forum, they can't login and it says that the "user does not exist", where as the user does exist both in the admin panels of Joomla and SMF and is activated. I am using SMF's registration system. This problem started when the number of users on the forums crossed 1600-1700. What could be wrong?