If you still have installed vmm 0.3.x you have to proceed this step first:* upgrade your vmm installation to version 0.4-r41If you have installed vmm 0.4/0.4-r41 you have to proceed this steps:* stop Postfix and Dovecot* backup/dump your database.* backup/dump your database!* start psql and connect to the appropriate database (ex. psql mailsys)* update the database: \i update_tables_0.4.x-0.5.pgsql* execute upgrade.sh* start Dovecot and Postfixelse* read INSTALL