The database server could be connected to (which means your username and password is okay) but the digitilize_mylifescore database could not be selected.
digitilize_mylifescore have permission to use the digitilize_mylifescore database?username_digitilize_mylifescore. Could that be the problem?If you do not know how to set up a database you should contact your host. If all else fails you may find help at the WordPress support forums.