[otrs] Questions about ticket lock

Hi, I'm trying to have unlock timeouts working on the system but it won't. I've set up a 1 minute unlock timeout for Postmaster Queue (which receives all tickets). I create a new ticket via customer interface. I can see the ticket appear in the Postmaster queue, the state is new, and it is not locked. I lock the ticket in the zoom view, the ticket is still new, but locked. Now, I wait a couple minutes and launch the UnlockTickets.pl script from the command line : -- # bin/UnlockTickets.pl --timeout UnlockTickets.pl - unlock tickets Copyright (c) 2002 Martin Edenhofer Unlock old tickets: -- The ticket is still locked. Same if I wait for the cronjob to do it. Using '--all' actually unlocks the ticket, though. What criteria must the ticket match to be unlocked with --timeout ? Did I miss something ? Thank you, Brice