Got an error: Bad ObjectDriver config: Connection error: Can't connect to MySQL server on 'mysql' (61)

This error has been appearing when I try to update my blogs (I manage two MT blogs through different accounts). At first I thought it was just my computer freaking out, but when I couldn't find anything wrong with it I tried to update it using a friends computer, but still I got the same error on both sites. Why is this happening?

The MySQL server has either disappeared or moved on you. Check with your host provider to see if the MySQL server is still located at the host specified by DBHost in mt-config.cgi.