Hi Ross, if you're having what I think it is, where you enter all the details correctly and all you get is the dreaded "red x" then this was the fix for my site. It should work, did for mine, sometimes the path can change, not sure how though. Hopefully Simple Machines guys can fix the bug (if there is one). I guess with anything IT related things can go wrong, anyhow..........
In
Admin, go to
Smileys and Messages then click
Settings.
Make sure that the path to the main site is the one that its supposed to be on.
Hopefully this fixes it.
Cheers,
Carl