Database / configuration error when forums are active and already running

I receive sometimes an empty side with Database/configuration error for some time.

why??

Hmm... this sounds like a database server issue. Have you talked with your web host's support people?
- mb

Yes, probably it's because of bad hosting.

Sometimes when I work in my forum there is a warning appearing: Database configuration error, but everything is still working all right. What is this error and how to correct it?

Thanks to everybody in advance!

It means that connection to your database is broken sometimes - because of server overload or maximum connections reached. Nobody could say you more except your provider. The reason is NOT in miniBB here.

P.S. It is very well-known error on russian providers for me ;)