Got exactly the same problem. Joomla-Installation is up and running, SMF-board also.

But the problem ist still there. Public boards can be read by anyone if he/she is not registered. Once you register and try to view the same board, it seems to be blocked somehow. Even the board's head does not show up. No error message or whatsoever can be found.

Find and fix did not help also.

Does anyone have an idea?

Kindest regards, Sterni.