hi all, please look at this

08/22/06
 14:39:53 ------------------------------------------------------------
08/22/06   14:39:53 Schedule Name:         SDB_EXP_SCHED01
08/22/06   14:39:53 Action:                Incremental
08/22/06   14:39:53 Objects:               /db/sdb11/backup01/backup/
08/22/06   14:39:53 Options:               -su=yes -preschedulecmd="su -
oracle -c /db/sdb11/backup01/backup/sd
b1_do_bkup.sh"
08/22/06   14:39:53 Server Window Start:   17:43:00 on 08/22/06
08/22/06
 14:39:53 ------------------------------------------------------------
08/22/06   14:39:53 Scheduler has been stopped.

08/22/06   22:39:55 Scheduler has been started by Dsmcad.
08/22/06   22:39:55 Querying server for next scheduled event.
08/22/06   22:39:55 Node Name: SDB
08/22/06   22:39:55 Session established with server TSM01: AIX-RS/6000


why didn't scheduler start at 17:43 on 22.8 (yesterday) ????
the message in error log says :

Either the window has elapsed or the schedule has been deleted

:-S which is not true

i'm confused. i asked for help month ago and nothing :-)