I've installed Porteus on 15 old computers to automatically connect to a Windows multipoint server to manage a classroom and this works great !

But still have 2 smalls problems
I've a config.txt file on the network to manage them and a line to shutdown the computers every days at 19:30 (7:30 pm) but computers don't shutdown. I dont know what I did wrong ..
here's the line :
scheduled_action=Monday-19:30 Tuesday-19:30 Wednesday-19:30 Thursday-19:30 Friday-19:30 Saturday-19:30 Sunday-19:30 action:halt
the second one : computers automatically login with credentials to the Windows Server but is there a way, when they logoff, to automatically shutdown the local computer ?
Per advance, thanks very much for your help
Arnaud