"Hi, I've send a pm but I am not sure you've received since it stays in the OUTbox instead of sent..."
That only means it is unread. It's how phpBB3 works.
I get this message when i try to access your /administrator.
The server at (your IP) is taking too long to respond.
I do see the error you described on the frontpage though. It's difficult to help when you can't access the backend
