Phpbb critical error

I just noticed that whenever, (after a post most noticable) I use the elysiun forum index link or a topic link at top, I get a black page with this on it:

phpBB : Critical Error

Could not connect to the database

-I dunno if it is my browser or the elysiun server

That happened to me a few days ago, but not since

This happens to me alot! Like 5 times a week, I live in Sweden